Paralyzed by the fear of talking

I've been considering dropping out of college for about half a year and I think it'll be best for me but I completely freeze up when I know I need to talk to my parents. I'm mortified by the idea of telling them when I know they probably won't agree. It feels like everyone will be against me if I'm honest about my thoughts and feelings. I keep doubting myself and having nervous breakdowns but the cycle is never ending. My chest hurts whenever I try to think about talking to them. I'm crippled by the fear of talking to others about anything slighlty personal in case they don't like it. I don't have any close friends and no one to confide it. I'm scared to change but I'm also scared to stay the same because I know I wasn't happy in college. I don't know what to do and I've been in this same place for a long time but can't seem to move. Any advice on how to effectively communicate without having a anxiety attack, freezing up, or avoiding it altogether?