I need advice

I pretty much need some advice or maybe just someone to listen. I don’t really have friends so I figured I’d post this here. My husband and I have been married for almost 10 months. We’ve been together 4 years but we knew each other growing up. My husband’s brother which is now my brother-in-law is so completely mean and cruel to me and I’m so sick of it and don’t know what to do anymore. Way back before I met my husband I knew his brother and we were friends. He liked me as more than a friend but his personality wasn’t the best and I wasn’t attracted to him. I only saw him as a friend. Well a few years down the road I started dating his brother which is now my husband. Ever since we got together the brother has been a complete ass. He’s always talking about me behind my back but acting all friendly to my face. He’s always picks out my flaws and makes fun of me to everyone. I’ve always been kind and treated everyone with respect but I’m tired of it. A few weekends back we all went to eat together and he spilled his drink all in my lap and my pants were soaked. I didn’t want him to feel bad or embarrassed so I played it off and told him it was completely okay. He ran into our mailbox and broke it and I told him not to worry about it that we would get a new one. I always spend money on his 3 year old daughter. I make sure she has Christmas and birthday gifts. None of it is appreciated. I could win the lottery and split it with him and he’d still treat me like dirt. He constantly talks about my makeup, clothes and hair. It’s like he has nothing better to do than to down me and I’m just so tired of it. All I want is the same amount of respect that I give because I honestly don’t have it in me to be mean. Does anyone have any advice for me on how I can deal with this. Obviously there’s nothing I can do to make him be respectful so how can I just go on like this doesn’t bother me?