GIRLS/GUYS: i really need your advice?

ok, so there is this girl that had liked me for 2 years and i liked her too but ive never wanted to date her and even now two years later, i get jealous when she's with another guy or likes another guy but i don't like her anymore. ive never wanted to date her though. am i in love with her? infatuated? or is it just lust??