How do you deal with someone who is excessively immature?

My ex is 19 going on 8.

We're on good terms, and I was supposed to go visit my hometown this weekend for prom. (I know it's lame, but his parents are making him chaperone his sister and he really didn't want to be the only person there alone.) But my dad's wallet got lost, and now all the money we have to last us two weeks is the balance of my credit card.

I called him up and told him that I probly wouldn't be able to make it, and he got all upset. He was pissed cause he had spent $600 on flowers and a tux and general prep stuff. (that was how much we lost too)He's like "What am I supposed to do? I really wanted to see you!" I told him I was sorry, I was looking forward to it too, but I had way bigger problems, like how we're gonna make it two weeks until his next paycheck. But he doesn't care. He has a roof over his head, no bills and eats his mom's cooking.

I feel bad that I can't go but dammit, I can't deal with him being so childish. If I ignore his calls, will he go away

Face it, darling - boys mature less rapidly than girls do. What we see as logical - don't spend money because you're almost out of it - he's stuck in an egocentric world where he's the only offended party, and might well even illogically think you did this on purpose (or your dad did).

We all knwo it wasn't on purpose, but until he can understand that, perhaps it is best to break off contact with him for a while - at least until after the prom is over and done with.

Besides, you've moved on to bigger and better things.

Unless the two of you have children, I would tell him you no longer wish to communicate with him. There is really no reason to keep contact. Tell him you won't answer the phone when he calls. Tell him that if he visits you, you won't let him in. And tell whoever you see when you visit your hometown not to let others know. That ought to do it.

i really don't have much of an idea, but maybe you should just go with the flo, maybe had planned something bigger than you might have expected...

Yeah, i think you should just cut off all communications with him until he sees that you have to many problems to be going to prom with him, he has to eventually understand that you CAN NOT go.