I like this girl for a few months now.. but she made out with a guy at a party, what do i do?

ok so i lyk dis girl for a few months nw were not dating but we really lyk each other tat it seems tat were dating but wer not nyways der was a party at the end of the year thing for school nd every1 wnt so at tat nyt i got a call&she was very drunk but her bestfriend stole her phne&said tat she jst made out with a guy i freakd out but told me to chill about it&she hung up of course i was pised after but she explained stuff to me the day after&i forgave her dis was weeks ago but i jst realizd tat wer not tlking much nymore&i wantd to knw whts up so i hacked into her email (i knw its wrong) and found somethin ok so my friend who she made out with had confessed feelins to her the week before the party, to his friend but never told her&no1knew cuz it wasnt obvious and nw tat she knws he likd her she doesnt knw wht to do. she doesnt knw i knw about this. the wrong thing is i still <3 her bt i knw i hv to let go.i hvnt talked to her in awhile, i still like her, but i dont know what to do..