It is not wrong to ask him to wait. You are doing absolutely nothing wrong by asking him to respect your decision to remain chaste. I know it sounds very cliche, but if he loved you this wouldn't even be an issue. Let's face it, nobody has ever died from not having sex. He is making it an issue in the hopes that you will change your mind and give in but you need to ask yourself what that says about his real feelings for you. He is asking you to give up something that is very important to you, something you can never get back, your virginity. The sacrifice of giving up sex is nowhere near as monumental.
Don't give in to sex just because you are afraid you will lose him. You will only come to regret this decision. Sex is not something to be taken lightly. It should not be treated as recreation or a test of your love. Your boyfriend seems to be treating it as both. If he can't live without sex he is the only person on the planet with that affliction. Everyone can survive without having sex. When he says he can't go back to not having sex what he is really saying is that he won't, in effect he is saying that your relationship is not worth giving up sex for. How does that make you feel? Do you really want to lose your virginity to somebody with so little true regard for what is important to you?
Stay true to your dream of remaining a virgin until marriage. It is a good dream. Do not give in to this guy. You want to wait until marriage, that is important to you and therefore it should be important to him. Even if you later decide to have sex before marriage with somebody else it should be your decision, it should not be coerced with a fear of losing the relationship. Something inside you is sending you strong signals that this guy is not the one -- listen. Not only is it fair for you to ask him to respect your feelings on something this important, it is essential in a relationship that this sort of respect exist. If anything re-think your relationship with this guy, but don't waste any time re-thinking your position on your virginity. You are totally on track!
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