I would be lying if I said I wasn't surprised to hear him ask me that.

"How do you know when you're in love?"

"Well..." I said thoughtfully as I came back across the room so I wouldn't have to speak as loud.
I didn't want to wake up Ferb.

I haven't had to think about how I knew I was in love for a while, so I had to think very hard, back to all the talks my mother and I had, and how I felt when I was pretty sure I was falling in love with Phineas.

That seemed so long ago.

Well, it was. Almost a lifetime...

I took a deep breath before sitting back down at the foot of the bed next to Phineas.

"You know your in love when your willing to do anything, just to stay with the one you love, and have them happy." I began, -recalling one of the very first pieces of advice from mamma.

Phineas nodded thoughtfully as if telling me to go on.

"You know your in love when you always want to be with that person, or when you never want to see them sad or upset." I continued.

"And it's not just outward appearance, -though that can be a bonus- that really matters. It's what's inside that counts.
It's...its..." I trailed off as I tried to find more words.
"Sometimes you just...know."

Really, this was a hard subject to describe as it can be a little different depending on the person.

"It's a terribly complex subject to explain, but mamma used to tell me this saying a very long time ago, when I was just a little thing, and it seems to simplify things by a lot." I said.

The simpler the better, or else I'm afraid Phineas might get something out of this that is completely incorrect.

"Go on." Phineas urged.

I don't know if it's a bible verse or something, but I always kept it memorized because I found a lot -all of it actually- very true.

"Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
Love never fails." I recited by heart, and watched as Phineas' eyes went wide as if he were taking in a lot of new information and was trying to keep track of it all at once, which was probably exactly what he was doing.

"Wow, Izzy." Phineas breathed as he stared at the wall ahead of him.
"I didn't know you knew so much about that subject." He marveled, -turning his head to look at me.

I smiled at his innocence.

Sometimes it could be annoying, but most of the time it wasn't, like right now.

"Well, let's just say I've had experience." I said mysteriously as I stood back up. "But I should probably shower now." I added before making my way towards the nicely decorated bathroom once more and leaving Phineas to himself.

"Thanks Izzy." I heard him say from the room as I closed the door.

"Anything for you Phineas." I whispered to myself as I locked it, and grabbed a white fluffy towel from the silver metal rung hanging on the wall near the door, and set it on the counter so I could access it easily when I was done before turning on the warm water of the shower.

I wonder why he wanted to know such a thing.

Maybe what Ferb said really was true.
Maybe Phineas is in love, and he just doesn't really know it, or know what to label his feelings.

But then again; why would he defend himself like he did?
Why would he deny and deny, as if telling himself it wasn't true?
It was almost like he did know what he was feeling, but didn't want to admit it.

Since I'm already asking myself questions, I might as well ask myself, -again- ...Who?

Who does he "love"?

I asked myself this a hundred times over as I ruled out any other possible options, and people while massaging shampoo and conditioner into my long hair under the warm water that ran down my back.

I desperately wanted to believe it was me. But that sounded a little greedy, and self-centered. Besides, it was almost near impossible that it was me.

I've lost count of how many times I've been reminded that I'm his "best friend". Just that. And he seems to want to keep it that way forever.

I stood under the warm water and let it run over my hair, and wash out any extra soap as I washed my body.

After I finished I turned off the water and stepped out onto the soft wine red bath mat as I grabbed the towel from the sink and dried off.

It was then I realized I had forgotten to grab clothes, and all that wonderful bathroom stuff.

"Great." I groaned as I wrapped my towel tighter around me before going to the door and opening it a crack.

Of course I forgot my bathroom stuff, and my clothes.
The other stuff isn't as important as the clothes though. I had to forget clothes.

"Hey um," I said through the slightly open for as I cleared my throat. "Phineas?" I said rather sheepishly.

"And Ferb, if your awake." I added.

"Yeah, Izzy?" I heard Phineas acknowledge from his bed.

"Would-would you mind turning around? I...forgot my clothes."

Oh man. I bet my face is red as a tomato.

I heard Ferb chuckle, -probably despite his efforts- and I knew he was awake.

"Haha, very funny, Ferb." I said sarcastically, -rolling my eyes.

"Sure, Izzy!" Phineas answered cheerfully.

Gosh, this was embarrassing.

I waited a few seconds after I heard them shuffling around before eying the door between the two rooms and darting out of the bathroom and into safety, -not looking at the boys once.

I breathed a quiet sigh of relief as I silently closed the door so I didn't wake up the boys' parents.

"You're good boys." I said through the door before walking over to my suitcase that was sitting open on my un-made bed.

As I held my towel up with one hand I dug through my clothes with the other and pulled out undergarments, a pink crop-top that had a black infinity sign across the front with the word "love" as well, (Picture in media) and dark wash jean shorts that had a small rip near the hem on the right leg.

I quickly went to the bathroom and got dressed before taking care of my hair that was a frizzy mess, and all those other fun bathroom things.

After my hair was straight and frizz-free, I made my way back to the boys' room.

I knocked on the door, since it was morning and someone could be changing out of their pajamas.
I didn't want to walk in on any boys today.

"Everybody decent?" I joked through the door.

"I could ask you the same thing." I heard Ferb say.

I rolled my eyes before turning the non and opening the door a crack.

"I'm taking that as a yes and coming in." I stated opening the door all the way and entering.

"No, wait Izzy!" I heard Phineas exclaim, but it too late.

Crap crap crap...this is not what I wanted.

I quickly closed my eyes and put my hands over them in a panic.

I may love Phineas, but not that much.

"Just kidding." He added with a snicker.

My hands flew from my eyes which fluttered open to see Phineas fully clothed in clean clothes still sitting on his bed, chuckling to himself.
Ferb who was now dressed as well, also found this amusing as he had that twinkle in his eye as he smiled slightly.

"I hate you guys." I said over dramatically, -taking a pillow from the bed closest to me and throwing it at Phineas' head.

"You may "hate" us but your stuck with us." Phineas stated, -easily dodging the pillow. "Forever." He added seriously with a mock death glare.

He was definitely teasing, but I couldn't help but hope that was true.
It would be a nightmare if I lost my boys. I wouldn't be able to live with myself. They're basically my life.