Friends/Relatives: Are we supposed to accept this as part of life?

I'm talking about people I played football religiously on a Sunday and went to school with as well as in addition, my dad's brother's son's. Maybe in my own little existence, I'm feeling it because of the fact that I've recently lost my job, still live at home at the age of 30, have no real friends to socialise with or to talk to, no girlfriend, no sister, and just pretty much have a lower quality of life that I want. I mean, I weren't really that close looking back, but it was on the forefront always perceived upon. What my point is, is that over the last 5/6 years, I've witnessed both family and friends get married and gradually out of sight. Not that I want to think and believe this, but I always put it down to the wives who are heavily influential and have an impact. With my cousin for example, you are made to feel patronised and a stranger rather than made to feel special. Almost 5 years ago, I had this big massive fight and don't really speak to him since. I'm not a jealous person by any stretch, but with him now having a 4 bedroomed house, his wife and no children as such, it seems from the outside, he seems to have the life of riley. I on the other hand only just got my career together only to fall a casualty at the hands of public sector cuts :-(