Before you get your knickers in a twist, some of the Glee canon was changed due to Flashpoint. So, don't correct the things that have been changed from the canon, because it's a result of Flashpoint. It would be unrealistic if some part of Sebastian's life didn't change after Barry returned, after all, Team Arrow's lives were changed.
When Sebastian found out that Henry was killed by Zoom, the first thing he felt was anger. He had spent so many years hating the man, and when he finally forgives him, he was killed before he got the chance to tell him that. Now he'll never get that chance, and it hurts. To make matters worse, his adoptive father has Alzheimer's. Sebastian had visited him, and he was so out of his mind, that he didn't even recognize him.
Something that he keeps to himself is that he has a memory of having his heart crushed by Eobard Thawne. He tries not to think about it, but any time it's quiet, his mind drifts, and he's watching his own death. He's even started dreaming about his murder, how messed up is that? Sebastian will never forget the fact that when he was in high school, his shitty personality caused Karofsky to take his own life. Also, before Barry changed the timeline, apparently, he was friends with some people named Kurt, and Blaine. Sebastian has no idea of who the hell they are, though.
"Hello Sebastian." Eobard chuckles.
"What the hell is happening? Why is Barry losing his memories?" Sebastian growls, slamming his fists against the cage.
"You want answers? Come closer." Eobard demands. Hesitantly, Sebastian walks inside the cage. When he gets inside the cage, Eobard vibrates his hand through Sebastian's chest, crushing his heart.
Sebastian falls off his bed, gasping himself awake from the nightmare as he clutched his chest. Fuck, that had been so real. Slowly, he grabs his phone, and that's when he sighed. It's one forty-six in the morning, Barry was probably sleeping. Since he's never going to get to sleep now, Sebastian decides to heat something up in the microwave. He wasn't a chef by any means, but any idiot can use a microwave. After getting the leftover Chinese out of the microwave, he sits on the couch, and that's when his phone vibrates, indicating that he had a text message.
What the hell? Who the fuck is texting me at almost two o'clock in the morning? He thinks, and that's when he looks at the screen. The message was from Barry.
"Hey, are you awake?"The message reads. He decides to finish the food before replying to the message, not wanting to get food on his phone. Once he puts the dishes away, he sits on the couch, opening the text.
"Yeah, why?" Sebastian asks.
"I just woke up from a nightmare and now I can't get back to sleep." Barry answers.
"Do you want me to come over?" Sebastian asks.
"Actually, I was wondering if I could come over to your place?" Barry asks.
"Of course, dumbass. Get over here." Sebastian tells him, making sure to add a playful emoticon at the end. It was two minutes later when Barry arrived, slowly walking inside.
"Thanks for doing this. I didn't know who else to go to." Barry states, slowly sitting on the couch.
"That offer to stay here still stands, by the way." Sebastian reminds him.
"Thanks. I hope I didn't wake you." Barry states.
"No, I was already up." Sebastian admits.
"Is something wrong Bas?" Barry asks.
"Ever since you came back from Flashpoint, I keep seeing Eobard shove his hand through my chest, crushing my heart. It used to only happen when I was asleep, but now, I've been seeing it anytime it's quiet." Sebastian answers.
"I keep seeing Flashpoint as well." Barry admits.
"Was that what your nightmare was about?" Sebastian asks.
"It's like I'm back there, asking him to kill our mom again. I'm running, and soon I'm back in time, to that day. I'm watching him kill her all over again. Suddenly, the scenery changes, and I'm restrained. She's screaming at me, asking me why I did this, telling me that it's my fault that she's dead, and she's right. I couldn't live in that timeline with you dead. I just couldn't do it, not when my memories of that other timeline were fading away, so I had to change it back. Only, I ended up breaking the timeline even more." Barry sighs.
"Listen to me, you need to let that shit go. Do I regret how much of an ass I was back in high school? Yes, but sitting here dwelling on what I should have done does nothing. I would have done the same thing if I had your powers when Henry died. You need to stop blaming yourself over something you had no control over!" Sebastian snaps, trying to get through to him.
"Easy for you to say, you're not the one constantly being told how much of a terrible person you are for going back in time, how your decisions screwed with everyone's lives." Barry scoffs.
"That's it, I'm going to kick Ramon's ass the next time I see him." Sebastian growls. How fucking dare you? You encouraged him to do this, and now that he did it, suddenly he's the bad guy? What the fuck Cisco?
"That won't solve anything. He'll just find a way to turn it around on me." Barry sighs.
"I don't care. He's a piece of shit. It was a fucking drunk driver that killed his brother, not you. It's time he gets his head out of his ass and realizes that." Sebastian snaps.
"Can we just drop this? It's not worth it!" Barry pleads.
"No Barry. You need to stand up for yourself. He needs to stop tearing you down, and until you stand up for yourself, that won't happen." Sebastian growls.
"Then you talk to him. If I do it, then he'll just find a way to turn it around on me." Barry sighs.
"Come on, we'll handle this tomorrow. You need some sleep." Sebastian demands.
"It is tomorrow." Barry teases.
"Smart ass." Sebastian chuckles, leading Barry to the guest room. Once he was there, Barry goes back to sleep, and that's when Sebastian returns to the living room, turning on Netflix as he watches his favorite shows.