ADVICE NEEDED: How Do I Payback My Cheating GF

Hello Mayowa,

I have a girlfriend whom I unexpectedly fell in love with her. Unlike my previous relationship I was 100% faithful to her and I mean it. I supported her with all her financial demands and I felt she was really in love with me because of the way she acted. I work on the rig and she is a student of Uniport in her final year, Whenever I was leaving for the rig for 3weeks, I left my car with her. several stories from people who claimed to be her friend told me how she kept gallivanting with my car and sleeping around, but I was not deterred. I even told my parents that I have found someone I was gonna get married to.

To be honest, she started acting funny towards me, not giving me time during the short period when I am around, and always coming up with excuses. Following from a tip off from an anonymous caller, she was in a hotel with her friend and a man she claimed to be her uncle. I got to the hotel (Le' Meridian) in GRA ph, went to the pool side and after having some drinks, I called her to find out her whereabouts, she lied that she was in school, but in less than 30 minutes she was downstairs with her friend (I supposed they just had a party). I confronted her and she lied. I got hold of her bag, and saw K-Y gel and condoms.
I have since walked out of the relationship, but it still hurts me. My phone still has her Unclad pics she sent to me. I am being tempted to do something nasty cos I am heartbroken.

Please advise Me Friends