She might be a lesbian. What do I do?

[ProfGene.Togolot]

You can be friends with a lesbian just though she understands that you are not. If she is a decent person she will respect your wishes and if not then she lost a friend but you don't have to ask her. She will tell you or if you feel she is hitting on you then you could tell her that you are not interested but still wants to remain her friend if she is willing to know you on that basis.