The thing that struck me is his going through your bags, opening your mail, etc. That signified a fundamental lack of communication that made him feel entitled to invade your privacy. My partner and I are married, we've been together for nearly 25 years. In spite of that, neither of us would ever look at the other's checkbook, cellphone, dresser drawers, closets, billfold, pockets, bags, etc. We are deeply respectful of each other's privacy. If either want's to know something, we just ask.
I agree, some counseling is in order, with an eye to establishing a new level of communication between the two of you.