Is it ever okay to have a thing for your best friend's sister?
I've known this friend and his sister for most of my life. In the last year or so, I've started to like her a lot. I tease her all the time, and she always acts really flirty around me, so I think she likes me back. She's a few years younger than me, but she's really cute and sweet. The two of us never really talk except when I see her in person, but I have her phone number because I've tutored her in the past, and I've been thinking about seeing if she'd want to talk or IM. I feel really bad about liking his sister, and I probably won't ever act on things, but I've considered making a move on her while I'm drinking at my friend's house... It's just hard to repress these feelings, so I don't know if I should follow my head or my heart. :/
Think it'd be okay to at least just start talking to her to see if I liked her personality?
This is just very emotionally confusing >.<