How do I ask this girl out

av

So I have a friend that I hang out with sometimes cause we’re from the same friend group. And we have a really good connection but both of us are in the closet and I’m not supposed to know she’s gay but I do because her friend told me. I think she found out about me somehow even tho I’ve only told two people and I feel like she’s been flirting with me. I really want to just go for it but I don’t wanna overwhelm her or make her feel like she didn’t have the chance to tell me because I already knew about her. What do I do?