Less attracted to women?

I just graduated and I am almost 18. I noticed recently that my attraction to women has not been as powerful as it used to be. It's a noticeable difference and at first I was worried that I was "batting for the home team". The problem with that is that with other dudes doesn't sound at all appealing. So here I am not knowing exactly what to think and a little worried. Honest input would be great, thanks.