Crush on a friend...

I'm a girl, and I'm currently in a relationship that I'm happy in, my boyfriend completely makes me happy in every way. Lately I've been seeing more of my friend (who is a girl) and I've felt myself becoming so attracted to her. We've been friends for a while and our friendship is kind of close, but I kind of feel like a creep for feeling this way towards her. I would never want her to feel weird or anything. Also I told my boyfriend how I feel towards her and he's not mad at all, but I feel weird liking her this way.