It's important to understand that Asexuality is not (entirely) defined by a biological lack of libido. While it's true that many Asexual people experience little to no sexual desire or arousal, it's entirely possible to have a regular or high amount of sexual drive or even to engage in sexual acts with partners and still be fully Asexual. Asexuality is not simply the superficial absence of sexual desire, it is an orientation, it is a conscious disinterest in sexual matters.
If you feel you wish you classify yourself as an Asexual, that is entirely for you to decide. It sounds to me however, that you have an interest in boosting or otherwise increasing your sexual drive, but are experiencing troubles in achieving this.
There is no 'normal' libido to compare yourself to, each person varies from the next to some degree.
I may lack the perspective you are after, being both a male and Asexual myself, but if I might make the suggestion, I'd advise thinking about seeing a professional Sex Therapist. Sex Therapy helped me greatly in this regard and it sounds like it could be quite helpful for you as well.
I wish you luck.