There are many factors which cause and maintain an unhealthy crush or infatuation.
Your mind might be trying to repeat ideas in order to prolong the suffering... It feels good to feel bad. Being aware of the thoughts can help us leave them behind.
We might stack our emotions, making it so much more difficult to disentangle them. We might feel embarrassed that we have a crush, or blame ourselves or the object of our affections for making us feel this way. Of course, it's a lot easier to deal with just one emotion rather than three on top of each other.
Ultimately, these things are not personal. If someone acts in a way that you think is incorrect, they're probably not doing it to spite your eternal soul. They're merely playing out their own dramas, just as you are.
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