I know it hurts but you have to care of yourself, it’s a win win situation in medium long term. So, if you are heartbroken because of his attitude (No matter if he’s young, or if he’s having problems to commit himself or whatever) if it’s harmful for you, it’s all said.

I know you are feeling very sad and despaired but sometimes it’s needed to go through hell to get the Heaven. You will grow stronger because you DID stand up for yourself.