Dear Inq:
What ever you are, just know that you're fine. There are all different levels of sexual interest, all different shades of sexuality. As long as you aren't hurting anyone (kids, animals..haha) you're fine.
In life our hormonal surges fluctuate hourly, minutely, yearly.... You're in the mood more at some times than others.

Some people are more sexually oriented than others, as well.
My exhusband was very bland about sex. It was okay sometimes but he wasn't into it often. My boyfriend after that was ALWAYS into it and drove me nuts. My current hubby is calmer than this and isn't about getting into my pants every chance he gets. (darn it!)
Some guys don't have any interest in the opposite sex, some only the opposite sex and every level of interest in between is out there. My current hubby is (according to him) 100% hetero, my exboyfriend was more "flexible"....

Just be true to what you want inside and listen to what makes you happy. Don't worry about being undersexed or oversexed, straight or gay. Just be happy.
If you really feel there's something wrong with your testosterone levels, that can be easily checked.

Do yourself a favor and have it done to rule out any physical problems, then accept yourself as you are and hang out with others that feel the same way.

Hope that helped!
Missy