Most Helpful Guy
I think that the months break is where things started to go downhill
Most Helpful Girl
"I need to get over it or break up with him." This.
"If you want to be in a relationship with me, you have to destroy your relationship with this other person."
Would you want to be with someone who said this to you?
Would you want to be with someone who snooped around on your phone when they thought you weren't looking?
You're being insecure.
Your insecurity is destroying your relationship.
Unless you have reason to believe he's cheating on you (at which time he'd actually be doing you a favor so you could dump his cheating ass), everything you're doing is destroying your relationship and you have no one to blame but yourself.