The experience of limerence can include obsessional thinking about the object of one's limerent desire, an irrationally positive evaluation of that person's attributes, and a longing for reciprocation. Limerence can make a person feel ecstatic, their mental life focused on a passionate, anxious desire.

https://www.psychologytoday.com/ca/basics/limerence

The problem with limerence is we know full well that the person we are obsessed with Aint Shit and don't care about us, that we are very uncomfortable around them, but for some reason we idolize them and pine for them constantly. It's a negative feedback loop. We are mad at the person for not being or changing into the person we needed. We see how they are irresponsible with our emotions but somehow miss their abuse.