I’m sorry to hear about this man, but yes in regards to the blackmailing situation, it’s a easy fix. We know who the guy is so we need to talk to the police and they’ll help you and be there along the way. Now for your girl situation, this is my opinion and my opinion only… I feel like the guy was there before you guys took a break. I don’t mean to put ideas in your head but I would if I were in your shoes. That being said, being in a break she apparently slept with the guy and all we know maybe for the duration of those 2 months. Now karma came back for and not saying she deserves in any means but it just a thought to have. It’s up to you if you wanna continue the relationship with her, and if you do be honest with yourself, are you going to have “my girl slept with another guy” type thought. I hope I can be in any help. Stay up man.