So I m in friend zone, and now I am interested in that girl (classic

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I meet her at university, about a year ago but we started hanging out 9 months ago. Back then i had a girlfriend (this relationship lasted for 6 months) so we became friends but only on uny. We never went out, not even as friends, never went on coffe or anything else outside of university. We did spend a lot of time on uny but not outside. I had enough reasons to think she was hitting on me, but I wasnt really interested cuz i was in relationship.
I am not her problem boy, and we didnt talk much about our private lives. We even didnt speak for some time cuz once she came to uny all dressed up and really hot so I teased her and kinnoed her more then i should have (at this point my relationship was not great), oh yea I did not appologize for this.
I was allways a flirtatious with her and her friend, I even slapped her ass and I teased her allways, I even talked dirty things to her and that friend (because of this she got angry on me cuz i was to dirty lol)
One example of my attitude towards her:
Today we were walking and she said something like: Ppl on uny dont have class....
me: excuse me miss classy I didnt recognize you
her: well then you should look better
I step back and check her out from bottom to top and smile
her: (i cant translate this literaly to english but its somethin like go to hell, screw you etc. and she was smilling)
I am saying all this cuz I dont think I am deep in friend zone but I want to get out completly and make her my gf.
I know how i should do it (kino, flirt, all that) but she know I am flirtatious person and I use cocky&funny stuff all the time so she can see all this as me teasing her and that I am not interested in her, she can see it as me being myself and not some dude interested in her.
thank for any advice and opinion
cheers
ps. i will post more if I remember something that might be important
