Navigating Family Changes After Loss

My mom admits she resents me for needing therapy when she started blending our family with

her husband's and I told her it was her job to help her kid AITAH? My dad died because

of a seizure when I (17m) was 6. My mom and I were were there for the whole thing and

it was traumatic. Mom started dating again a year later but she didn't meet her husband until

I was 9. They dated for something like 5 months before they started doing stuff with me and

his kids. I struggled hard with him and his kids presence. For me the hardest

parts were changing things so that we had time for them and including them in the family.

It bothered me worse when mom wanted my paternal relatives to get to know them and treat his kids