<human>: I am a 23 year old dude post-college who is gainfully employed. My work situation is stable and technical. I live alone, and pretty much only leave the house to go to work and pick up groceries. 

I don't have anyone in my life right now that I could honestly call a friend. There are people I work with- exchanging emails, data, all job related. We never interact on a personal level, nor do we discuss what goes on outside of work.

The last romantic relationship I had with anyone was four years ago. It ended mostly due to me not caring enough about the relationship to make it last. 

My family - two parents, one younger brother [19M] - all live together about an hour away. My parents and I have almost nothing in common, and my dad and I get into fights over the smallest things whenever I come by. The last time that happened was two years ago. No contact since beyond short "happy birthday" texts. My brother is severely mentally handicapped, so nothing goes on there. 

I simply can't be fucked to get to know anyone. People have invariably failed me throughout my life, so why should they be trusted? I'm not happy, I'm not terribly sad - I just don't care. However, looking forward into the future is damn scary. Will isolationism completely rob me of any semblance of the normal human experience? Probably. I don't think my interests are terribly eccentric, or that I'm too abnormal to make friends... the motivation just isn't there. It really comes down to deep-rooted trust issues. 

So, my question to you normal, socially healthy people: why make friends? What's the point of forming a temporary bond with another human? How the fuck am I supposed to have a sense of humor? Cheers.

Can you condense the text into three sentences or less?
<bot>: I am a lonely, sad motherfucker. why make friends? how do I cultivate a sense of humor and not be so serious all the time?