Emotionally abusive men

I did the worst thing you could do and googled my ex on social media and it looks like he has a new girlfriend. I don't have any social media so I couldn't actually dig deep, but I saw enough. He was emotionally abusive and he ruined me. I am scared of men and getting into another relationship because of him. Why is it that the abusers are so easy to move on leaving the ones they abused messed up? I wish I could just tell her to watch out. I wish I was able to get over it and just be happy again. I am so tired of being almost 28 and scared to get into a relationship, I'm tired of thinking about him and thinking about all the shit he's done and said to me. I can't even have sex sober because of everything he has said to me about me, I can't stop second guessing everything I do because of him. No one knows what he is actually like and I know he is making me out to seem like the fucked up one.