Regarding constant mental harrassment from husband

I'm 30 yrs old. I have a 2 1/2 yrs old male child. I get married on june 2014. Right from that i'm constantly facing mental pressure regarding dowry. Hardly 2 to 3 months of time only we lived after marriage. That too with constant in laws tortures. My husband though he is a professor he always behave arrogantly. Before 2 months again with the efforts of his family friend, we started to live again together. He raised a demand to quit my career and to depend on him. Then he slowly made me to get pregnant without my wish since i'm mentally and physically not prepared for another baby. Since my first delivery itself a nightmare for me. He left me literally. With my parents financial support so far i'm surviving. Because of this situation, i have done the abortion with my father's signature since my husband refused to do that. At present situation is like a hell to me. He disturbed all my usual life and activities and now i'm mentally and physically weak after the abortion. Previously i was facing in laws mental torture and now my husband acting like a puppet of the middleman who helped us to get united. All our privacy things inside a four wall are getting decided as per his words. Over phone that 60yrs old middleman is talking about our private matters to me. My husband is not believing his nature instead of that constantly giving mental harassment to me. Unable to survive with a oscillated minded person like him. Though we both like each other the people around us playing cunning tricks to disturb our life. He dont have the capacity to understand the truth instead of that torturing me with his abusive words. Wanna put a full stop to this torture. Though i want to live with him , he is not going to handle things accordingly. Will divorce be the only solution for my problem? He is threatening me that he will take the custody of my child since its a boy. Somebody help me... I want to live a normal peaceful life my only baby with some basic respect as a human. No women can punish the in laws and husband whom are torturing us.