I'm sure you have heard this before, but if he dumps you after "getting what he wants" after some time, he wasn't worth it anyway.
My caution would be to be sure this doesn't turn into the kind of sexual relationship where YOU service HIM only, receiving no satisfaction yourself. THAT would tell you alot about him and how selfish or not he may be. (And don't say the hugging and kissing is enough for you; it won't be enough if you develop a pattern of fellatio only!)