How much longer until you're expected to graduate? I don't know what your particular family situation is, but I was a difficult (read: not neurotypical in several regards) child growing up in a home that was often ill-equipped to meet my (non-material) needs. Narcissistic parent. I often felt that there was no way out, and that the only way I could fix things (at the time, I felt responsible for all of the dysfunction and strife) was to remove myself from the equation permanently via suicide. I remember being eight years old and feeling that I had to kill myself in order to save them. It sucked (understatement).
I made it out. Obviously, I'm on SS, so there's that... but I've also accomplished things I never would have thought possible. I took a strange, cursory path to get here, but for the most part, I am living the life that I wanted when I was younger. (Or I would be, if said life hadn't also come equipped with severe, chronic, treatment-resistant mental illness. Which is why I'm here.)
You are young. Suicide will always be an option, but it is so final. I know right now feels like an eternity, but I think you deserve the opportunity to experience what life could be like on your terms. Do it to spite them, if you have to.