A few thoughts
- Going through her email/facebook is female behavior. You even used the word snooping. Everyone knows snooping is something broads do. Kill yourself
- She is a whore
- Get yourself some female friends. You don't have to fuck them, but stay in contact/hang out with them. She'll get jealous. When she complains tell her to beat feet if she doesn't like it.
- You're not married. Going to "couples therapy" tells me that she runs the relationship. This should not be.
- You don't trust her because you can't fully trust a woman. Part of you has to believe she can be a traitorous whore...unfortunately for you she's proved that she is a traitorous whore.
- Your chick reaches out to her ex to meet up, he responds in a less than excited manner, she replies "No big deal". She's crushed because she's auditioning new candidates and no one likes being rejected.
- You're officially the standby guy until she gets some new dick. You're probably not fucking her right. She's going to blow one of your best buds. Walk away.
Whores til proven otherwise. And they so rarely do.