Steve Rogers has always been a man with a plan. That's just how he gets on with life.
Though, after the events of the team defeating Thanos, he's left with a lot of more choices on what he could do. For once in his life, he doesn't know what to do next.
He could go back in time and right the wrongs, and maybe even have another shot at the life he so desperately misses, or he could stay.
Spoiler alert: he does the latter.
Not because he doesn't want the world to see him as selfish, but because Bucky's right here.
Wherever Bucky goes, he follows. He'll choose him over anyone else, over and over again.
Because he's with him 'til the end of the line, and God knows what happens when anyone tries to change that.