When a guy says that to you, he does mean he doesn't want to hurt you. no one wants to hurt someone they're involved with. the only thing missing from this sentence 99% of the time is the word "but". that is, "i don't want to hurt you, but....".
it's not easy to hear someone say they don't want to hurt you, but i would have to agree with tony and taughtmepatience that it more often than not means that something is on his mind, like a break-up or moving on his life without a partner.
if a guy KNEW they weren't going to hurt you, or were very sure they wanted the relationship and the love with you, you'd most likely hear something like, "i'm not going to hurt you" or "i will never hurt you".
someone saying they "don't want to hurt you" (be it guy or girl), doesn't mean however they don't love you. they may love you deeply but for some reason, a relationship is not what they're looking for at this time of their life. there could be a number of reasons.
talk to him and ask him what he meant by that comment. it could have been an ambiguous comment, but while it is on your mind and worrying you, ask him what he meant by it instead of trying to guess. you'll feel a lot better when you know what he means and where you stand in his life.
by the way, you don't need to 'interprete' what men say. that will drive you crazy!!! the easiest way is to just simply ask what they meant and to tell you honestly.
When a guy says he doesn't want to hurt you and you've been involved with him does it mean he really doesn't love you? How do you interprete the things men say?