She Cheated On Me And Even Told Me To My Face. see how

I have been dating this girl for the past 4years, she later gained admission in to the University. I kept faith with her because I felt she is worth it. Her days in school, I realized her interest in talking to me kept dropping, inasmuch as I assisted her financialy, I really didn't care about the attitude until I travel to her school and invited her to the hotel I lodged, surprisingly she refuse to see me. I came back.
Funny enough I have not had sex with her because I believed in our future.
Recently she just came back from school and we went outing and I asked her if she had a guy in school, she admitted, yes. My entire system changed. I asked for sex she still refused me, then it became clearer to me that I mean nothing to her. I transport her to Lagos from school and even trying to buy her phone but my mind is made up on her.
Is there any remedy you guys can put up for me on her?