Is it normal that i want nothing to do with my dad after he ruined my life?

Okay so I grew up with a drug addicted family and this included my father. he was a deadbeat and became a full on alcoholic. when I was 10 years old I found out my dad was cheating on my mom. Before my mom did. he hasnt done anything really for me in my life but give me a sad story to tell. yeah thrown me some extra bucks. but he owes me that my mom would give him child support and he'd spend it on weed. not food, clothes, school supplies. I use to to save up my lunch money just to buy some school supplies. i lived in a rich neighborhood everyone was perfect i felt so out of place. I know weed isnt the worst drug but having drug dealers show up at your house threw your whole life its not fun. weed smells disgusting and is was ridiculous how much he smoked and how he thought it was ok. he couldnt even open a window to air out his tiny apartment. Now im 17 living with my mom and my father wonders why i dont want to talk to him or have any contact. Should I forgive him?(even though after i moved out of his house he didnt talk to me for 3 months)Oh and his girlfriend worked for Child protective services.wtf
Btw: During all this my mom was trying to build a home for me and my brother while my dad harassed her for drug money on a weekly basis.