Dude I'm glad you're in a better place. Our lives have very strange parallels. I was with my crazy ex from 17-32, she also falsely accused me of raping and beating her, telling our friends, family, my coworkers and neighbors - I even got a night in jail, but thankfully recorded conversations of us talking about her bruises and her saying she'd falsely accuse me - and I dealt with her craziness and fought for our marriage for years only to find she was cheating on me. When I found out and threw in the towel she went completely unhinged, especially when I got involved with another woman. My ex also died not long after we divorced.
I've now been with my wife much longer than my first and it's been nothing but wonderful. I did not let my experience with my ex change my outlook on marriage and relationships... I don't want to be with anyone that doesn't want to be with me, and I'm convinced anyone cheating is going to screw up and get caught so there's no need to be suspicious and go looking... it'll reveal itself in time, and if so, I'll say goodbye. Unwarranted distrust does great harm and it seems to be projecting with most people. Trusting each other and loving each other's company is the mainstay of a great relationship and I'm so thankful I went from a nightmare marriage to what's really an unrealistic movie romance. I didn't really think such an amazing relationship was possible.
Glad to hear you're in a much better place and relationship. A past of bad experiences should make you be more careful who you get involved with but if you use it to build walls around yourself, you hurt your relationships. Love with your all and don't live in fear of betrayal. It's the only way a relationship can become what your heart longs for.