<human>: Can you condense the text into a few key points?

I form real relationships with girlfriends after several months of daily time together, but I can't say the same for my other relationships. I'm even sharing a house with two friends of 10 years and feel completely alone. Has anyone else been in this position, why can't I connect with people?

Whenever i talk to people we go through the same small talk about their job, what happened in politics, or maybe even the weather. But we don't actually discuss these topics in detail. Anything that might be mildly emotional, interesting or controversial is avoided at all costs. That includes the small talk topics, no talking about politics if you may need to have a civilised discussion on some policy that you disagree on.

I feel like most conversations people are just counting down the seconds until they can talk, without really participating or caring about what the other person is saying. What's worse is I sometimes notice myself doing this too and it disgusts me. I worry that most people are like me, so absorbed in their own world that they don't really care about anyone else that is not in their immediate circle. 

I hate that there is only one socially respectable response to 'how are you?'. I have sometimes told people how I truly am and seen it not even register on their faces as they carry on talking as if I'd said what they had originally expected. 

I am feeling lonely, I am not depressed but I can recognise it as a problem. Online discussions are fun, but don't seem to satisfy me where it counts. I crave human interaction, and yet I can't stand it. 

Background; a 29 year old with no history of mental illness, happy with most aspects of life. I've felt like this for the last 20 years, I'm an introvert that gets distracted by projects occasionally and then right back to loneliness. I'm in a relationship (currently 1 year), and my longest relationship has been 5 years. I do find my time with her fulfilling, but it's not enough by itself.
<bot>: normal relationships feel fake, i can't stand how they work and yet I am missing them. How do i figure this out?