In the past few months, I've really stepped back. I still take him to school and help with homework, but I don't push him to interact with me. DH has tried to bribe him a few times, like if you go give SM a hug I'll give you a piece of candy. I didn't like that at all.
Today, DH and I got in a huge fight. He called me a bitch and said I needed to help out with SS more. I told him that SS didn't like me and I wasn't going to force him to spend time with me. I told him that I know that I'm probably way more irritable, but it's because I'm tired of being the only one that has to deal with his tantrums.
DH said that I was a stepparent and would just have to deal with it. He said that SF is having the same problems with SS and we both needed to just accepted it. He said we shouldn't expected to be liked, but we still needed to do our job and take care of SS.