Why does it have to be her?

So theres this girl who I'm really good friends with and ireally want to come out to her, however shes always joking about how "gay" I am, even though she thinks I'm straight (never had a boyfriend or even kissed a guy however). But heres the real problem, besides her general hotness, shes tge only person who really KNOWS me and can see when im upset, even though i just telk her im fine. I really like her but its going to be so awkward if I tell her im a lesian bhecause of all the jokes shes made and ive gone along with. Help???