What to do? What to do?

I am really good friends with this girl I know really well and we talk all the time and are very close, but I dont think she likes me and I've tried to hint it to her. I would have already told her except that she has a boyfriend who she likes but is not desperately in love with if that makes sense. I'm scared if I tell her our friendship will be in jeopardy but I really want to tell her. Any suggestions on what to do to try to get her?