What should I do? I think that I may be a manipulative cheating abuser who needs to come with a trigger warning.
What made you come to this conclusion about yourself?
It is simply a symptom of my mental state.
It seems like you know that you have bad behaviors, and instead of just talking about it, you should try to get help for it. It's bad to cheat or be abusive, and if you're mentally in a place where you think that you need to be these things then you have to try and get some serious help or else you are going to have a lot of people give up on you and you'll have very few friends or loved ones left in your life that will deal with you.
You're not going to give up on me?
It's good to recognize your mistakes when dealing with others in the past. Now you have to work towards correcting those negative behaviors so that you can have a more fulfilling life.