Don't feel "part of the group" - Depressed & Lonely at University

Coming to the end of 1st year. Met a great bunch of friends during mid Sem1 whom I've grown closer to over the year, now go out and chill with them all of the time.

Not living with them currently but very close by so can pop over often. Still means i miss out on little things like watching a film or cooking together. My flat is very quiet so I get really lonely.

Not living with them next year, they got their house sorted as I met them as they're a big group so I'll be quite a distance. I'm worried I'll drift apart and no longer be a part of the group. Guys I'm living with are cool but not as close / as many shared experiences and not as fun.

Often I'm the one asking to come over, not invited, so I feel I'm intruding or being annoying. I get told they love me and I try to be and am told I am one of the nicest kindest and happiest person they've met but despite this I don't feel important to them.

I've tried to change the way I behave, be funnier, more kind, witty. Sometimes I feel I'm socially inept / awkward and that's why.

TL;DR
Live in a dead flat and feel lonely. Have a group of friends whom I go over often but feel by doing so I'm being annoying and I dont feel a part of the group no matter how much I try to change my behaviour.

Is it me, is it them, what do i do?