thinking of leaving - why should you feel ashamed? There's no disgrace in having sex or in not having sex. It is a personal choice. If you change your mind, you might want to try it out. But no one says you have to, so stop feeling ashamed for something that is no one's business but your own. Anyone who wants to can get laid, so if you want it, it's out there. If you want to be more selective, that's OK too. If you're just not interested, you don't have anything to prove to me, at least.
here's where I will offend many many people I imagine. If you want to try out sex, get the hang of it, not wait for a true love who may or may not arrive, ask a close friend of the appropriate gender, a trustworthy one, to show you the ropes, so to speak, with no commitment on either side.