It's sounds like you've become attached to the idea of a relationship being a source of happiness. Being in a relationship is different than being single. For some it's better for others it isn't. So while you see what your friends have and want what you think will make you happy, keep in mind that it may not. It's better to be single and happy than to be in a relationship and miserable. Take your time and find the right person, that way the relationship really does make you feel secure and happy instead of finding yourself in the middle of a stressful situation that makes you feel worse rather than better.