Okay, I've calmed down a little and am ready to stop being so melodramatic. I talked to my dad about all this and he thinks I should just think of it differently. When it comes down to it, I guess I'm being paid to watch her and being her friend is just a side bonus. The only potential bad thing is if I lead her on too much about it. So I just have to stay friendly but detached, maybe come up with something productive to do with her (help her with her homework?) so that she thinks we're hanging out for a reason other than BFF-ness. A little morally gray but not too bad, I guess. She's just a little girl whose parents don't have the time for her. Maybe if I was her I'd take any pal I could get, even if they were being paid to hang around. I don't know. I'll have to see how it goes.