Why is my boyfriend so unappreciative?

I think its time to let him go. Be careful though since he has anger issues you should probably have someone there with you when you talk to him. As for the money - be straight up and tell him you need it back. If he doesn't give it back then you can actually file a case on him. I know it sounds like too much but honestly - he's 31. No one's a child here and you're both mature enough to pull your heads in. You feel sorry for him I get that but if you continue like this he will keep taking advantage of you and treating you like crap. Trust me you should be with someone who truly loves you and cares about you...Good Luck!