There was never a moment, not when the world was dissolving and fading into nothing, not when two alien races scorched earth and tried to tear him apart, that Teddy wasn't sure where he belonged; not since he found his home with the Young Avengers. It was a simple decision for him because there was no decision. Wherever his friends were, all of them, that's where he belonged, and they all seemed to share that sentiment. As much as the world didn't want to agree with them. Cassie was making it increasingly difficult for Teddy to keep on thinking that. He didn't think he'd ever see his home fracture, not after what they went through.
So he didn't know what to say. He had to come to terms with the idea of me instead of what was best for the team, and everything in him fought against that. He did want the same thing Cassie did; he wanted this world without a generation of heroes torn apart, with Captain America still alive and a prosperous population of mutants. But, and he couldn't resolve it just in himself, "I don't know how to make it worth it for everyone."