you cannot give up. if you want to give up, then you should do everything in your power before you would give up, to make your life better.

if you have 0 friends, try to make one. take up hobbies with people, sports, martial arts, music, dance, anything. the more you meet people the more chance you will have of finding someone you can connect with. there are 7 billion people on earth, there is no way you cannot find anyone if you really try.

if you don't want to take up any hobbies, just go to discos, cafes, talk to girls, try to get to know them or pick up them. if you dont know how, dont worry, just try it, you will make a fool out of yourself, but you have nothing to lose and every time you try, you learn from the experience. but if you really don't know, just watch youtube videos or read books about interacting/charming people. a person you can perfectly connect with (=girlfriend) can make you forget depression. just dont wait life to give you one for your 2 blue eyes, you have to work for it. life is survival of the fittest. but if you put in time, and dont run away from problems, anyone can do well socially in life. if you find some common topics to talk about you basically already have a friend. there are many topics, there is no way NOTHING interests you? what about football, computer games, books, comics, etc, there is a group for EVERYTHING in the world.

BUT:

YOU, have to do something for it. you need to take risks. take a risk to talk to a girl(risk here is making a fool of yourself), take a risk by subscribing to a social instruction guide(risk is losing time with it). most of these things are low risk high reward situations. you can lose nearly nothing. even if some people laugh at you or think you are dumb, there are 6,999,999,997 more. your possibilities are endless. you can just travel all over the world and meet with people. dont be shy talking to them, most people crave for social interaction just like you.