Does anyone else find themselves just not talking to anyone?

I'm soon to be 23 years old, on track to get a well paying job on leaving university. I live in a nice area, get loads of exercise, eat nice food, am healthy ect. I'm not even unhappy. But over the last few years I have noticed more and more that I just don't talk to anyone.

I can't remember the last time I had a conversation lasting more than 5 minutes. I have a few people that I call friends but I never see them and I don't know much about them, or them about me.

Anyone know what I mean?