Oh my God if this thread isn't me. I've been here for about 3 weeks now but I've only made one sort of friend and I'm not exactly sure how far it will go. I've joined societies and yes, there are nice people in them but I just haven't clicked with anyone properly yet. I'm not really close with my flatmates, people on my course either don't seem like my sort of people or already have friendship groups or I just don't see them often enough to establish anything. I feel really miserable even though I'm forcing myself to go along to practises and training and meet people because it's just so draining. I'm just not an outgoing person and I just feel like I need someone to have with me to talk to because at least at home, I have my family and I really like being around them.
I totally get what you mean and I know how annoying it is to hear it but I suppose it just takes time. Slowly, cliques do form and you'll be in them. Maybe try a society that sounds really inclusive and geeky even if you're not that interested in it like knitting, board games, quidditch etc.
If you ever need to talk, I'll be right here to vent with you! I feel this pain.