I've never been to Plymouth.
My flatmate at UEA a couple of years ago was from there though. He had such a farmer's accent LOL.
I didn't enjoy uni either. I won't lie. You'd think drinking, cute girls, and freedom would be fun for a guy, right? Nuh uh. I went with a minor health problem, so ended up just drinking J20 on nights out anyway. Soon enough I didn't have too many friends, nor a social life. I dropped out with a year to go.. Pretty stupid, but hey! My life went in other directions.
Some people say it takes a year to settle in at uni, which may sound crazy, but I think can be true. By my second year, I was more relaxed about things, but my depression had set me way behind on my course. I ended up bailing! I think you'll warm to it more than you have so far as time goes by. That's not to say you'll like it, but you'll probably settle better.
You're 19. That's a great age. There's plenty of time to work on yourself. You're like dough! You can mould yourself in to whatever. Have you ever explored the reasons for your fear of intimacy, and your social anxiety? That's something you could be looking at. It'd be more productive than drinking too!
If the whole uni set-up isn't fulfilling you, maybe there's a chance to get active outside of that setting? Maybe there are people in Plymouth that are maturer than the average uni student. I don't know whether it'd be easy to meet such people there, but in Norwich part of what kept me sane was meeting people living in the city that were a couple of years older and less prone to stupidity.
I hope you begin to find some enjoyment in it soon, even if it's just sitting outside the student bars at night, laughing at the drunk kids as they stumble home!