Should I be honest with that girl and ask her out after screwing up and asking her to be my wing woman?

We are both in colleg together taking the same cl together.The last time we talked which was last Tuesday.I asked her to be my wing women and she said I am flattered but no and I asked her why and she said because I have a lot of guys in my life and I don't want to have the pressure and it is too much pressure.Then I asked her if you are seeing someone and she said yes(she said yes in an (non serious tone) sorry.I am 110 % sure she is single and is using an excuse.Her facebook relationship status says single and her looking for is friendship. I know she is single and the reason why I asked her to be my wing woman was testing her and we where sitting in a group and I did not feel comfortable asking her out in front of other people. I asked her to teach me how to skate and dance.She plays roller derby and asked me to come watch her play,but I did not go because her game was 2 hours away because she played against another team in another city and not our city. She started flirting with me first.Then I asked her where it is then she said where and I asked her if she can send it by facebook message and she said she will then I sent her a message asking her where and she did not respond to the message but posted the event on her wall.Should I go ask her out and ask her out I want you to be my wing woman but want you to be my woman.