Hold in your anger and snarky comments. Fight to be nice. It's really hard for me and my adoptive mother. Just fight really hard to be nice to him, even if he treats you like crap. Like tonight, I swear I was gonna blow but then I started clearing the dinner table and I focused on that instead of fighting with her. So instead of blowing up and getting grounded, I got thanked for my help with clean up. Give it a try.
Haylee, you don't say what the problem is. And all of your replies have been "tryed". Maybe you haven't tried hard or long enough. I'm sure he would rather get along with you than argue. Talk to your mother. Talk to HIM. Ask what you can do to make the relationship work. Don't be defensive or whiny. Have suggestions. Be willing to change negative behavior, yourself. It takes time to bond with a step-parent. Find some things you both enjoy and do these things. Make some effort. Good luck.