First off, thank you for putting this into words - I totally connect with your situation and understand where you are coming from with this.

I'm still at university, but have already lost contact with most of my friends from last year (many of whom I lived with in halls of residency). I'm fine with this, however, as many of them were just people I used to get drunk with for the hell of it. Those were never 'real' friendships. I speak to loads of people on my course but never really connect with anyone. Don't get me wrong, I've tried - I'm often stuck in the lab for an entire day with various partners. There's just no connection there, like you mentioned. It doesn't bother me all that much though.

I also work part-time in a field which requires all the interpersonal and communication skills you mentioned that you yourself have - I'm a Barista at a massive coffee chain, I spend my shifts chatting to strangers as though they're my best buddies. I'm pretty good friends with some of my colleagues, but mainly because we can all rant and rave about the same stuff - crappy customers, sore feet, etc. I've never gone out with any of them outside of work, however, and once again... I'm not that bothered, haha.

I obviously love the company of my fiance and have good relationships with my family but other than that, I have no social life and I am mostly happy about that!

It sounds like you're a little bit of an introvert. Me too, girl. I have a core group of close friends, my family, and my boyfriend. That's it, and I'm mostly happy with that. Much like you though, I get lonely sometimes. My solution is to talk to some long-distance friends I have or go for a walk and clear my head. I hope at least some of this helped.