I'm bi and in love with an older woman?

I really like my neighbor, we've known eachother for a long time. She's like 5 or 6 years older then me, we talk alot though. I like her alot. She is not bi though, she says she is but the other day she said maybe I'm bi, but idk if she was kidding or not. I like her alot, and was kidding around tellin her what would she do if I liked her more then just a friend or neighbor. All she said was she didn't know. Then she started texting me if I really have a crush on her and I told her the truth and said yes. And that's when she said maybe I'm bi, so then i started to like her more. She asked me how girls would do it, but idk if that ment anything. She said she would have to think about it, but today she said she's not bi. But she's flirting with me, and alway asking me question. She thinks I'm to young for her though. What should I do? I really like her, I'm not sure what I want to do! Hellp!