Do I cheat on my spouse, or be miserable in my current situation?

I am married to a very infuriating man. He has put his hands on me only a few times, and I know he has cheated on me a few times. We are both young and we got pregnant young which has been the main reason we are together. However, our parents got married after we found out we were pregnant...so you can imagine the situation is complicated. I had been having a rough time in my marriage when a guy I really liked in highschool told me he had liked me for a very long time and I had no idea until that point. I feel like I can't get a divorce due to the complicated family issue and having a child together. That and I have no financial support of my own. I am thinking about cheating because I think I could love this other man who is so incredibly sweet to me, while my husband calls me dumb and everything else he can think of. We constantly argue, but we know a divorce would be a very complicated issue, so we have stayed together. But I honestly don't know how much more I can take, and the man I'm thinking about cheating with has been nothing but a sweetheart to me from the day we met. I feel like I deserve this oppurtunity to see how I truly feel about him, but I'm terrified of my husband finding out. Although I must say I don't feel guilty at all. Any advice? I know most of you are going to call me disgusting, but you just don't understand. He cheated and I feel I would have been better off never knowing it happened.