I hate the crush

I hate when I get crushes on people,  they never reciprocate,  they always send mixed messages,  (I mean why else would I be getting a crush on them)  I always like those wishy washy assholes, who are hot and heavy one minute and completely ignoring one the next.  they are not the sort who truly care about me or well being, and going through shit I put myself through for thier undeserving asses is such a pain, such a fucked up cycle that I don't know how to stop.  it there a pill to make you stop giving a shit about certain people,  the ones who don't have those feelings for you?