You should do things that make you happy! I know it is hard especially when your parents want you to do something and don't really care about what you want, but you have to accept who you are/ you're past even if it might not have been great, you can't dwell on it, you are young and still have the ability to change your future.
You are not a loner!, you just haven't found the confidence to be happy with who you are and so you have blocked the world out in a way. I'm sure you have a really fun and exciting personality and are just keeping it hidden!
No one can be a loner, trust me, the weirdest of people have friends because in a world and society like this you are bound to meet people with similar interests and hobbies as you, you might just have to make the first move with other people to find this out.
You're young and at uni, you can join clubs, sports clubs, music clubs and different societies. you have so much opportunity to meet people with similar interests as you, at uni so use it!
btw I'm sorry if this kind of turned into a deep post