I'm in love with her and she's not a lesbian

There's a girl we've been hanging out with for a while. I don't think she's a lesbian, but I fell in love. Here's the problem. I realized I liked her the moment we had a fight. And we had a fight over my best friends .Now she doesn't like me.I see it every day and she passes me by.I know it might sound dumb to you but I can't stop thinking about her.When I get home I want to cry because I know I could have talked to her , but I never dared