Is there a way to stop hyperfixation?

I'm 37 and newly diagnosed as an autistic. I have major suicidal tendencies and tried to kill myself just the other day. For my whole life, I've struggled with hyperfixating. My family is very supportive and kind, but I just know deep down that I disgust them. I never tell anyone my hyperfixations, unless they happen to know already. Can I get rid of this? Can I be normal? My hyperfixations aren't my whole life but consume my every other thought, and trying to hide them is hard. The other day, I was folding laundry and gasped when I saw a clip of my favorite game playing on the TV. My response was completely involuntary. I think I'm developing a new hyperfixation soon because of something to do with Halloween movies. I want to stop this before it gets worse. Any advice?