I’m so lost and have no idea what to do. My girlfriend moved out a few days ago saying “we both need to work on ourselves” and took all of her things. Coincidentally she left the same day as my friend who was staying with us. We’ve been friends for 7 years. I let him stay with us because we were all mutual friends before and he’s been unemployed. I gave him money, clothes and a place to stay. Before today i had no idea they had slept together, multiple times.

I’ve spent the last couple days trying to improve myself and apologizing for not being there. She spent the last few days saying she wants to work things out, i just need to “do better and she does too”. Today he facetimed me and came clean. He’s saying i haven’t been a good friend and he did this to get “revenge on me” and he’s “sorry and loves me”. She is saying i pushed her to this point with my actions and it’s basically all my fault.

I have been distant but my mom has also been in the hospital so it’s been hard for me to be emotionally available. I never cheated on her, i never hit her and i tried so hard. Why do i still feel like the bad person here? I also never stopped her from leaving. That’s what hurts the most, why didn’t she just leave?

Other info: My age: 22 | Her age: 22 | His age: 20. I also have screenshots saved to explain better if anyone is interested.

EDIT: Thank you all so much, the feedback has been insanely helpful.

Edit #2: They are both currently blocked on everything including him on xbox. I did message them longer than I should have because I was trying to get a good answer and justification. I have had them blocked since last night after saying what I need to say. I have zero intention of ever letting them be even a slight part of my life ever again. Thank you guys.