I agree with you Roooth. People generally have high standards when it comes to relationships, but when it comes to sleeping with other people, they're more easily persuaded. I think this works for both genders. Especially in the world of today where sex isn't necessarily associated with a relationship.
As for the thread starter, don't worry too much. I'm in my twenties too without a boyfriend at my side. Don't listen to your friends, listen to yourself. Don't be afraid to have a relationship because it might not last. If you don't give it a shot, you'll never find out!