Serious signs of interest then rejection. Can you tell me why did he do it to me? Kinda long, but I beg you!?

Your English is okay. But anyway, I think he really wants to be with you but is afraid that he might hurt you. Also, he is a little shy. In shy too and it's hard to talk to someone. Just ask him why. Maybe he feels he has an inner problem that might affect you guys' relationship in the future. I'm not sure.