i hate how i sweat around people i want to talk to, its embarrassing i feel ugly

I feel all my friends and things that I used to find comfort in are disappearing, like I'm the one that doesn't want to engage with what I once loved...no one seems to listen now, or share the same interests that I do. and ask me "Why won't you just talk to me! Theres so much to talk about!" Then turn around and just zone out on me when I do wanna chat...then make me feel I'm the problem...Thank you for reading...

I am a 31-year-old male. I help to look after my 72-year-old father, who has parkinson's disease and has a serious mental health disorder. I am at school earning a BSN, and I am taking courses to learn coding on the side. Just to add some new skills, you know :). My father, however, becomes very verbally abusive and says just absolutely hurtful, hateful things towards my mother and me. He is very jealous and always tries to compete with me by saying he will "Go to Princeton and be the big guy on the campus and finally people will acknowledge me and see me for the genius I am. I don't care about anyone else but this. I will be the next Einstein". To my mother, he says, "I am going to divorce you and take $9,000 to Princeton and fulfill my dreams, and you or nobody else can stop me". Even though my Mother, whom is going to be 80 years old, whom I also care for, does EVERYTHING for him. Sorry for bringing this up, but the way he treats her and me sometimes is horrendous. Had to vent.