Lack of sexual satisfaction

I have a "friend". Well he's not rally my friend, but I know him and we occasionally talk. We recently had sex. Long story, lol. I don't feel anything really when I get penetrated. It's like I know what's going on, but I don't really feel anything. I've talked about it with friends and they say sex doesn't usually feel good until you've done i more, and I do lack A LOT of experience. I fear, however, that I am will become a nymphomaniac
By definition, it's a woman who becomes obsessed with having sex because she can not achieve orgasm. I crave sex, it's almost ridiculous how often I think about sex. I can orgasm through cl*toral stimulation, but I fear I can't orgasm from penetration :[ Is it normal to not feel anything (if you're a girl) the first couple of time you have sex? The time with my "friend" was really my second time having sex. My first time was the same, but that was a couple of years ago. But I did like having sex, it was fun. But not in a "oh la la" way. Bah.