Should I stay?

I have been with this guy for almost 2 years we are getting married in may but i am confused. See I was with this guy named mike before my new guy eric. Eric was with his now ex ashley which they had a kid together Kaden. When mike and i broke up because he was cheating on me with ashley. i was destoyed. He was my first love and I lost "it' to him. Mike and Ashley had a kid and now have a nother one on the way. Me and eric got together and i just found out we are going to have our first child togetherbut for some reason I still have felling for mike. Even thought he was abusive and put me in the hospital 4 times. Is it wrong for me to still care about him? Should I not be with eric just so I dont have to be any where near mike? what should i do... I am just confuse??? But I really don't want to have feeling for mike I want to hate him! Why can't I? If someone could please give me some advice I would love it and thank you.