Can't Fake It Hard Enough

I figured out what my problem is. It's quiet simple actually you see. At first I cared to much. I got so hurt all the time. Let down after let down, my hopes trampled everything shattered. That really changes a person. Now I find my problem is I don't care enough anymore. Nothing really strikes a response in me. I am so blasé about everything I try to show my excitement but it comes out in the same useless expression of nothing. I don't know how to fake it hard enough to for people to believe I  love their efforts. I think I come off as ungrateful but if only you know, if only you knew just how grateful I really am.