Is it normal to not consider your friends... your friends?

If you want to be alone, you can just go to some jungle or desert and build ur home there. Do what you want to do. No one stops you from being alone, you want to be alone then just leave people, leave the society for good. Why haven't you done that ? Is it because you're scared ?

Smoke a blunt, and listen to jazz. Take two and comment in the morning

Keep things simple. In this scenario you don't have to either be on hand to save someones life or expect them to save you. You mention this and it sounds like your expectations of friendships are too high.
It could be you are hanging with some people you don't click with, hate is a strong word and I think few people mean it. Dislike or annoying, may be better adjectives to get used to using and helps keep a healthier perspective. Would suggest like others that you stay off the weed for a bit, smoking can be a downer.

You might be going through a conscious level, gear change. It happens throughout our life but can be more frequent and more confusing when we are younger and working out the impermanence and futility of things. It can be very scary, but actually its natural enough to struggle with certain concepts - especially when we live in a world that appears to value commercialism way more than existential conflict.

Your description of being a grain of sand on a beach is actually pretty healthy, we are all of us insignificant in this way, we are nothing on our own and vulnerable to unpredictable forces. It's easy to see life as utterly pointless or at least see yourself as nothing more than a demanding, irritation to an otherwise harmonious universe, but you are an essential ingredient and were it not for you, or the people who are your friends, the universe could not be what it is, for some reason you are here and contributing whether you like it or not.

Give yourself a break, stay off the smoke for a week (maybe even forever) and maybe try and notice the smaller things that you like in your friends, its not just a random accident that you are with them.

I had "Friends" like that. I didn't care for them, we hung out and stuff but there was nothing there. They always wanted to ask me for help and advice but they would never actually take it and then complain about being in the situation again. They sucked because they never really cared about me when I did. I stopped hanging out with those people completely, started living by myself and I did a lot of searching within.(lol sounds corny I know) I'm a lot happier now with out those people. I don't have to waste my energy being around them and I can focus on myself. If I want to talk to people I just hang out with the two people that care about what I have to say and understand. Granted this took me 4 years to do but I've learned a lot about myself in the process. I also agree on with DubstepismyMJ.

Nah if you truly didnt want to be saved you wouldnt have posted that much :)
I think you should follow your heart and have some alone time. Maybe your mind just want to do some soul searching.
Drinking and smoking fogs your mind for clear thinking, So i think you should stop for now.

Ive been in that same boat before, just wanting to engulf in the darkness, being alone. Which i did But that feeling passes with time. I can assure you that.
As for hating yourself, (which i have also) your be gonna stuck with yourself for the REST of your life. So you might as well learn to love yourself.
Learn to forgive yourself, of past mistakes.
learn to love the things you cant change about yourself
Learn to change the things you CAN change, to love yourself.

Such hate is a very heavy load to carry, young fellow. Perhaps if you lightened this load a bit you might find some tiny reason to live and have a friend or two.
Life should not be wasted as you are doing; it should be a joyride through the good, and bad, in the company of others who inspire you to be a better person.