Charades Anyone?

"It's all fun and games until someone gets hurt." Let me be there only in your worst, and disappear when you are at your best. That's the only thing I'm good at isn't it? Call me selfish. Call me stupid. Call me whatever you want to call me. No one really needs me when they're at their best. I'm so used to being used that I've fallen in love with it. I'm just addicted to it. You can use me all you want. No biggy.