It sounds like your past relationships haven't given you much happiness. Sometimes, we want someone to care for us and we want someone to be with, and we think that the romantic partner is the only option. But we forget to look around, and while we look for that someone special, we miss the people who truly help us and strive us further, our friends. Because friends will pick you up when you fall down, they will help you and they will do everything they can to see you happy, they are the people you [need].
I think it's too early in your life to feel like you'll die alone, you have many years to find someone special, but for now, you need to lean on your friends and realize that they're the best people in your lives, throughout. While relationships have there drama, there stresses and there woes, friends have less of that. Strive for your friends and spend more time with them, a relationship will come, don't force it.