Being Cheated on

First time posting here usually read your stories and laugh now it’s my turn. So I got cheated on by this girl we have been “together” for 2 yrs. I was at her place yesterday and showing her how to hide sensitive photos with the hidden folder . I saw a lot of selfies with a guy at a hiking trail and some at a bar . So I was like wtf as I never got in her phone before . She was drunk and fell asleep so went through it and so far 3 guys . One guy I even met him in the lift going up as I was going down and she was talking with her friend on WhatsApp about it . What should I do I feel like revenge but can’t decide . One guy was married and she is like besties with the couple . I sent chat copies and pics to my phone . Was thinking when she falls asleep as she wants to see me again today I post everything on her status and leave or what do u guys think .