Leaving your husband to stay with your mom?

My husband and I just aren’t seeing eye to eye anymore. It’s mainly a family issue. He wants everything with his family meaning he’ll give them the world and my family, myself and our son not so much. I’m really sick of it all. It’s 6 yrs and 2 yrs marriage of this. I hoped once we had our son he’d wouldn’t pay so much attention to his older nieces and care more for his son but that didn’t happen. He expects me to play board games with them in a completely different room whilst his family plays with my son and I’m there entertaining his nieces. His brothers babyshower I just me wanted to look outside meaning stay with the baby but when I turned around to comeback here he comes with his nieces and my son over there alone with his family. I’m like seriously dude. His mom talks shit to me because I never went to college, compares me time and time to his older bro wife, was pissed off when I said I was pregnant first and while pregnant told me “I won’t buy the baby nothing cause he’s not born yet and you never know” this asshole is somehow still ok with all this. What should I do?? His sis always leaves the bro in law and it’s ok he’s all messed up from her bs. He tells me if you leave that’s the end of it I won’t know where you’ve been so I won’t take you back.