You sound like you might be repulsed. It’s possible to experience sex repulsion for a person of any sexual orientation. If you experience sexual attraction, you are probably not asexual, though you might be gray-A or demi, depending on how the sexual attraction occurs.
Since behavior is not attraction, it is completely possible to enjoy sex and be asexual. I suppose if you want a specific term for someone who does not experience sexual attraction but does not mind sex, that term would be an indifferent asexual, or an asexual who is indifferent to sex.
Gray asexuality describes people who experience something akin to sexual attraction that they identify as a kind of sexual attraction.
AVEN has been using the inverted white-to-black gradient triangle for more than a decade, and when it was first introduced it was flatter rather than equilateral. An explanation of its parts is on AVENwiki. What the triangle depicts is an extension of the Kinsey scale in a dimension for intensity. This symbol developed independently of the pink triangle and every other triangle symbol that is used by other communities. The only manner in which the AVEN triangle has changed over the past decade is that it has become equilateral.
So no, we will not stop using an inverted triangle.
Additionally, this blog does not work to invalidate any person’s decision to identify as queer based on their asexuality or demisexuality.