Is making friends even worth it? I show no interest in 95% of the people I meet and even those remaining 5% always end up being dicks or unstable after I get to know them. Additionally, when I do things with people I always feel like I wasted my time afterwards. I feel kind of lonely but don't know how much of that is just due to other's expectations since I generally feel like I enjoy my time alone over being around people I don't like (everyone).
They are if you can find the right ones.
I guess it is but it's really hard to find good ones so don't get too frustrated if you don't get them fast. I've had times when I had no friends and I was as suicidal as I am now. I have friends now but I don't trust them, I feel it's safer to not trust anyone given my life experience.
The pros of having friends is that you can be busy and have stuff to do that may or may not be enjoyable.
The cons are that they may require you to do stuff you don't want to do and put a social pressure on you. Some people like me and maybe you are loners by nature.