爱情 或者 Frienship ?

Well I'm a lesbian and I have a huge crush for a friend of mine. I think about her all the time and because we're 老友记 so we go together for coffee, 电影院 e.t.c. Lucky me. Thankfully we are not alone, just the two of us, but we have some common 老友记 with us, cause I couldn't handle it. The thing is that I think she likes me too. But then I think about it again and try to convince myself that is just cause I like her, that she doesn't have romantic feelings for me. And then it comes my biggest nightmare. She wants me to help her with her math exams(yep I'm a geek whose good at math and likes it too :P ).We will be completely alone , just the two of us. And here comes the big 问题 : Should I reveal my feelings and risk our friendship 或者 keep my feelings for myself ?