Family Law

We have been married for 3 years and I recently had a baby. I am a working mother who has single handedly supported the child so far and the family even before the child. My husband took partake only in some over head payments. However had zero committments towards spending for us both and for the house, saving, investing or for pregenancy. He has debts from before marriage and responsibilities with regards to his parents and married siblings who continue to be dependant financially. The same responsibility has not reflected in our marriage. To top it all, his parents demand them to be made my first priority in my life, expect me to seek their approval for every aspect on my life. My husband lives in my expense. He spends all of his on his folks and their debts, none of which was ever discussed with me before marriage or after. The post marriage discussions have only led to arguments and him walking out on me. I feel cheated most times that I was made to believe that I would be married into a relationship where both spouses have equal responsibilities in expenses and emotions. While I am at my parents' place post delivery, my husband shows no responsibility towards the child yet. He would visit us frequently, spend time with the baby however does not show any financial or moral responsibility other than the fact that he expects his parents be apprised of the baby's developments. In fact I am still paying for some of his expenses. Now husband demanded I return to our marital home while I asked for some more time to be at my parents since I need their support to look after the child. This led to yet another outburst and him walking out on me, vowing never to come back to my parents. It has been 4 months and no sign of him, He severed all communicatios with me, blocked me so to speak. He however continues to post pictures of my child on social media so as to claim his fatherhood. While my husband is financially dependent on me, emotionally traumatises me, does not have any responsibility towards the family, walks out as and when pleases and vows never to visit me or child, it gives me more reason to separate for good. Any self respecting woman with an ounce of morale would not want to be in a relationship as that. Please advise on how this could be taken up legally.