Most Helpful Guy
Yeah why not he probably misses something you two use share like memories and laughter. Or to keep you around as a back up, you will sense it, if that's what he's up too.
Most Helpful Girl
What do you mean, trust? Like - trust he wants to be friends? Yeah i would trust that since he said it. Seems like he is being honest with you. I would wonder about ulterior motives possibly down the line - but i don't see a thing wrong with ex's being friends.