My boyfriend’s dad hates me, what do i do?

Do everything you can to prove to him you're not like them. Keep your nose clean and always be respectful. Try not to push them. It would really help knowing how old you are. Feel free to send me a message

Let him know you're above your parents' struggles, and are not like them. Be as polite and respectful as ever. Offer to help with dinner when you come over or something. Maybe ask your boyfriend for some advice to get on his good side?

I think you are making steps in the right direction by asking this question.
People will generally respect those that show respect. First, earn his respect. Reject the lifestyle of drugs and alcohol. When you are in his presence, dress respectfully and speak respectfully. Show that you are willing to seek a better life through education. This does not mean that you have to go to school full time (if you are out of high school). You can work and take a class at a local school at the same time. If you are in high school, work hard at getting good grades. You've been dating his son a year now, you may even ask the mayor for advice!
If you try hard at making a better life for yourself than your parents have, you will earn his respect. And then you will earn his admiration.

I'm enrolled in the local police department, and he told my boyfriend i guess that he can't wait until the day i work for him so he can have a say in what i do. im always very respectful, i clean their house all the time because theres a young child, a dog and a cat that live there and i feel bad when the house is messy because of my boyfriend or the cat that we have together. i try everything i can to get him to like me and accept me, he just wont. the rest of the family has for the most part. (the ones that met me.)

Look, no one's perfect. You're going to have many people not like you, from your past, what you look like, how you talk. And it does kind of suck that you're boyfriend's dad doesn't like you, but hell, you don't have to like him either. All that matters is that you and your boyfriend are doing well. His father could try to persuade him in another direction, other than you, but it's all on your boyfriend and how he feels about you.