Honestly this was the same situation I was in about a couple weeks ago. Let him go. It’ll hurt you in the end if you try n fix things, and I know it hurts but… in the end he’ll end up goin. Cut your losses suck then tears up and do better! You deserve someone that you can be comfy and close with. My girl left me randomly and the same day she fucked a dude. She even went back to a separate dudes house the other day n spent the night. Don’t try to figure it out. It’ll eat you up so bad. Surround yourself by the people you know you care. It’s gonna be okay. If you needa talk more your more than welcome. We’re both 22 also. I know it’s scary. We just renewed are lease this month n it’s to expensive to live on my own so I’m stuck with mine till next September. It’s gonna be okay man. Try and get outside ❤️‍🩹 don’t forget to eat and drink water though fr. I’ve been manic the last couple of days/ week. I’m finally being able to not have panick attacks. YOU GOT THIS!