Could use some input please. :)

I'm going to try to make a long story at least somewhat shorter, I apologize if it's still lengthy.
 BACKGROUND: Been with my first and only boyfriend for about 7 years now we are both now 21. We had set when we were 17. 
When we were younger I was obsessed about six. I self taught my self everything when I was little. Now that I'm older the desire for actual intercourse sounds time consuming and I never feel in the mood for intercourse yet I'll occasionally have the sexual urge for foreplay nothing more. I now have very little interest in sex
QUESTION: is that normal? I feel like most my age just want to have sex all the time.