What is wrong with him?

I'm very confused. In the beginning of our relationship everything was great. We was married... we have two kids..1 year old and a 1 month baby. But things turned.. He would always bring up his ex girlfriend. Which made me feel uncomfortable. I never got over it. He called me a confused person and he can't be with me anymore. He says I don't lift him up. He even called me evil. I don't understand because I didn't do anything to him. He starts the arguments than blame everything on me. Now he telling me he wants to do polygamy because I'm hard to deal with, im full of drama and that I can't get over him talking about his ex.(which hurt badly) He also said no man wants to deal with me and he has a better chance in finding love. Now his family and friends are calling me evil. I been through a lot with him and I feel like having a nervous breakdown because I know I'm not evil. I didn't do anything wrong. I'm questioning my own self sometimes.

What is wrong with him?
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