The song is Just a Dream by Nelly and the relationship is Beau and Lucy.

I was thinking bout her, thinkin bout me
Thinkin bout us, what we gon' be
Open my eyes yeah, it was only just a dream

Beau had been thinking about Lucy. He had been thinking about how Lucy may have been the best thing to happen to him. He had also been thinking about the two of them and what they could have been. But when he opened his eyes, he realized it had all been a dream. There was no Lucy. There was no Lucy and Beau. It was just him dreaming.

So I travelled back, down that road
Will she come back, no one knows
I realize yeah, it was only just a dream

So Beau had travelled back down the road of his relationship with Lucy to see where he had gone wrong. He had tried writing to Lucy to see if there was any way she would take him back. He still hadn't heard back from her. He was starting to realize getting back together with Lucy was just a dream and nothing else.

I was at the top and now its like I'm in the basement
Number one spot and now she find her a replacement
I swear now I can't take it, knowing somebody's got my baby

Beau used to hold the number 1 spot in Lucy's heart. Now, because of his mistakes, he didn't even have a place in her life. She had found herself a replacement in Kendall. It was hard to take some days, knowing that Lucy was with someone else. The ironic thing was that she was with Kendall. Kendall had wanted to get rid of him and now Kendall had his wish. Beau was gone, so it was a straight path to Lucy. Why had he made so many mistakes? Why hadn't he been happy enough with Lucy?

And now you ain't around baby I can't think
I should've put it down, should've got the ring
Cause I can still feel it in the air
See her pretty face run my fingers through her hair

The first weeks it was hard to think. It was hard to go on without Lucy around. Sure, they had broken up when she had gone all Hollywood on him, but he understood. Lucy needed space to work on her music and besides, long distance relationships usually didn't work out. But Beau had this big plan to go to Hollywood so they could be together again. He had even bought that necklace. Maybe a ring was the way to go. But since he didn't, he was here along. Beau could still her face. It felt so real sometimes he felt as if he could run his fingers in her hair and lean in to kiss her. He could feel the love in the air at those times.

My lover, my life, my shawty, my wife
She left me, I'm tied
Cause I knew that it just ain't right

Lucy had been his first love; she had been his life. But now that she was gone, Beau knew that things just weren't right. Things wouldn't be right again until he could talk to Lucy and explain things to her; apologize to her.

When I be ridin' man I swear I see her face at every turn
Tryna get my Usher on but I can't let it Burn
And I just hopes she know that she the only one I yearn for
More and more I miss her, when will I learn

Beau would admit he was something of a player. He had tried to get back into that groove to get over Lucy, but he just couldn't do it. Every time he went to kiss another girl, all he saw was Lucy. He could only see her disappointment. Sometimes he could almost forget about her. Most of the time, he just hoped Lucy knew how much he wanted her back. Part of why they broke up was the long distance. A lot of it though was his playboy ways. When would he ever learn?

Didn't give her all my love, I guess now I got my payback
Now I'm in the club thinking all about my baby
Hey, she was so easy to love
But wait, I guess that love wasn't enough

Beau never gave Lucy enough of his love. That had to be why she wouldn't take him back. That's why he was still sitting here thinking about her, about how to get her back. Lucy was easy enough to love. She was smart. She was pretty. She liked taking risks. And she was a talented musician. But it looked like love hadn't been enough. He needed the commitment Lucy deserved. The commitment Beau couldn't give her.

I'm going through it everytime that I'm alone
And now I'm missing, wishing she'd pick up the phone
But she made the decision that she wanted to move on
Cause I was wrong

When he was alone at night, Beau went through it in his head. He went through everything he had done wrong. He felt so bad about it now. He wished Lucy would pick up the phone and talk about it with him. But she wanted to move on. Beau didn't blame her. He would want to do the same. But he had been wrong. He wished Lucy could get over it.

If you ever loved somebody put your hands up
If you ever loved somebody put your hands up
And now they're gone and you're wishing you could give them everything

Beau had really loved Lucy at one point. She was everything he wanted in a girl. But somehow, at some point, something had happened. Beau couldn't say exactly what it was or when it had changed. But it had. Now that Lucy was gone, he was starting to wish he could give her everything she deserved. He wished he could travel back in time and figure out what had changed.

Said if you ever loved somebody put your hands up
If you ever loved somebody put your hands up
Now they're gone and you're wishing you could give them everything

Yes, Beau still loved Lucy. It would take a while to get over it and maybe he never would. But for now, he would keep wishing Lucy was still here and that he could give her everything she deserved in a boyfriend.

I was thinking bout her, thinkin bout me
Thinkin bout us, what we gon' be
Open my eyes yeah, it was only Just A Dream
So I travelled back, down that road
Will she come back, no one knows
I realize yeah, it was only Just A Dream

Beau kept seeing Lucy in his dreams. He kept thinking about her and what they were going to be. He would keep going down that road of what ifs. Keep wondering if she would ever come back. No one could say, but maybe one day it could happen. For now, he would wake up in the morning and realize Lucy being in his arms was just a dream.