Like a lot of people posting here, being alone never used to be a big problem to me. I liked having time to myself, away from people, with just a few close friends I would see at school and occasionally outside, but ever since I moved away to university it has been difficult... I went to a different university to anyone else I know, and every person I meet, even the ones on my course who I'd always assumed I'd at least have some common interests with considering we were doing the same course, only ever seem to be interested in going to clubs, getting drunk/high and trying to get off with other people... none of which appeals to me, so I made the fatal mistake of saying no whenever someone on my course or one of my flatmates (who were even harder for me to connect with) invited me to go out with them to a club or a bar or something... sure, it was almost guaranteed I wouldn't enjoy it, but it meant I had instantly put myself at a disadvantage when trying to socialise, but I didn't see that as a big deal as I've never been very social, but later came to realise the important difference between being alone, and being lonely. I always assumed I would just eventually meet someone and make a connection, and that would be that. I've just finished my second year of uni, and I have not met anyone I can call a 'friend'.
To make this clear, I won't say I have no friends, that would be an insult to the people in my life I love very much, but they have moved far away so the time I get with them is very limited, and we don't talk so much anymore. I do have a girlfriend, but there is only so much she can do to help, and can't be around all the time, so I have been left here on my own for the summer. There is little more lonely than seeing everyone else going out with their friends to the beach or the pub and having a good time whilst you're stuck indoors with nothing else to do.
I have tried many, many clubs and volunteered for many things throughout my life, but in the end I still find it difficult to connect with people. I don't know why, I just find I have little in common with other people, and when I talk to them most just give me a weird look and walk away as soon as they get the chance, and the more I ask myself why, the more I start to judge and second guess myself, trying to see myself through the eyes of others and figure out a way to be more appealing and friendly, but then I argue that if I do that (which doesn't succeed anyway) then I'm not being myself so any "friendship" would be false, and I don't really want that either. This also makes me suspect I might be going crazy... Probably not though, but I still can't answer why I seem so odd to people.
The biggest problem I'm having right now, since I'm literally on my own right now, my friends/girlfriend are either at home or at a different university, and anyone I try to talk to (via facebook, email and the like) at best still leaves me feeling the same and at worst completely ignores me, is that you seem to need people to meet people. If I was to go out on my own to somewhere where people go to socialise, say a pub, people would avoid me, as I would in their place. You see someone going in to a pub and having a drink on their own, and you probably don't consider striding up to them and starting up a conversation, and if they come over to you, you don't really want them joining in with whatever you might be doing... So I'm completely at a loss to what to do.