Most Helpful Guy
"He really ruined me." No, you ruined yourself by staying with a cheater and tolerating his abuse.
Obviously, he was not happy with you. He may have said "I love you" but those are just words. He was miserable, blamed you, so he mistreated you.
You misjudged him horribly and probably rushed in to the relationship too quickly. Take some responsibility for the position in which you have placed yourself, learn all the lessons that you can, and then move on!
Most Helpful Girl
I've been in a similar situation. It hurts like hell but over time, as long as you stay away from him (no texting, talking to, social media stalking, etc.), it gets better. If he cheated on you, there's a good chance he'll do it to this girl too. Just forget about him and do things that make you happy. Eventually it won't bother you anymore.