How to get my child's father out of our lives?

I am a single mom and have been since I was about 7 months pregnant when my child's father walked out. He did not witness his son being born although I tried to make sure he was involved. My child is now 7 months old and his father keeps contacting me. Their are a lot of hurt feelings on my side of things, however I have put that a side for the sake of my little boy. His father has not paid any child support of any kind before or after his birth, and has only seen his child 2 times in 7 months. One time that he did he took him out at all hours of the night, while drinking and driving him in a truck with an airbag. I do not feel comfortable with him being with his son. I have tried to work out a schedule as I believe children need structure. He has since moved from Missouri to Minnesota, but has still contacted me once every week or so when he has been drinking heavily to tell me that he " misses his boy and that he loves him more than anything". This is very hard to believe considering he has done nothing to support my child; financially or emotionally. My child does not even know who he is, however he expects me to leave him with his father for a couple days "when he comes in town". I cannot possibly allow this to happen. My child is not a doll to be ped around, and does not sleep well when he has been with his father in the past. This whole situation has been tearing me apart as I would love for my son to have a father to look up to, but he has proven himself unfit. I do not want money or support from him, I have an entire family that loves my son and myself and has supported us emotionally from day one. I am able to support my son on my own and would love for my child's father to go away. I know that is horrible but I can't make him grow up and be responsible for himself let alone my child, and I have to protect my son. Any suggestions would be helpful. I am not looking for opinions just suggestions. Thank you