Me and my husband got married after a big fight with our parents. We convinced our parents and make

Me and my husband got married after a big fight with our parents. We convinced our parents and make it as arranged marriage. After 7 months I got pregnancy and came to my mothers house. I was blessed with a baby girl. When I am at my mothers house my husband talk with his colleague very closely. My husband office friend told me that he is in relationship with his colleague. I return to my husband's house with my baby. He started drinking regularly, eating gutka packets and fights with me. He came to home at late nights. I ask about his relationship, he open up and said about her. Now he is asking divorce from me and wants to marry his colleague. She is also intrested to marry my husband, she is handicapped. Now my baby is 1 year old. I am not in a position to do job with my baby. My husband is careless and also not taking responsibility of me and even my baby. Now what I do to change my husband and get him back. And also what action can I take on his colleague. Please suggest me.