I'm sorry for being blunt, but it comes from a place of kindness. What are you hoping to have with this person? To continue the push and pull game with no relationship progress? To start dating where you constantly wonder if he will pull away again? He has already shown you how he acts when he likes you, is that really the kind of person you want a relationship with? Even if he was hurt in a past relationship, its his job to work through it and become an emotionally healthy boyfriend for his future so that's not an excuse for his actions