Help!

So, there's this girl I like a whole lot. However, I haven't seen her in awhile yet I like her. I had a dream about her a few nights ago and ever since I had feelings for her (again.) She finally came out as a lesbian and I think she has a girlfriend so I'm afraid to try anything. Also, her girlfriend looks the type to try and beat my ass. I can hold myself in a fight but I refuse to fight unless there's a good reason. Plus, when it comes to asking people I like out and that sort of thing I'm a total p*ssy. I was on the phone with her for a few minutes and was texting her for a while today and had a huge smile on my face. I want to ask her to hang out or something but I'm afraid. Any advice? ):