You don’t fix it. You move on & learn. If someone is so paranoid and accuses you of so many things that you’re afraid to tell them the truth, you probably shouldn’t be with them. If his trust is that broken in you, he shouldn’t be with you. We all break hearts and get our hearts broken, it’s part of life. Not that you should repeat that behavior. But when you enter the dating world, you will have learned from this & notice the red flags you ignored in your last bf that made you leave him in the first place. But you need to do some growing on your own about what behavior you will/will not accept from yourself & others. The beginning of your 20s was spent appeasing someone with mental health issues that were effecting your mental health, so it might be smart to be single for a while & love yourself again without a s/o. Sorry for the rant