Are you actually ready for a relationship? Theres a difference between wanting/ needing to be in a relationship but not being mentally/ emotionally ready. I dont know you or your past so am only going on what you've typed. Maybe you need to process previous relationships a little more? And work out where you are at?
I guess because it's a lot easier to date these days we do it because we can without being ready. Or it could be that you haven't actually met "the one" yet.