My best friend always wants me to rub her feet. I don't have a problem with this, in an of itself. The problem is, that lately while I'm rubbing her feet I keep imagining what it would be like to kiss them, or lick them, or suck on them. Yesterday when she asked me to rub her feet she propped them up on my breasts, right up in my face.

More than that, I feel like I want to have sex with her, but... I mean I don't think I'm a lesbian.. How would she even react? We've been friends since kindergarten, so if I'm a lesbian I believe she'd be fine with that, but if I tell her what I've been thinking about lately would she be grossed out?

What should I do?