Lovesick

Being lovesick is a bad thing. It makes our minds relate almost everything to the person who broke our heart. It consumes a lot of energy, and kills the chance of having any good ideas, which are not associated with that one person in some way.
In other words: Being lovesick sucks. Besides, there are more important things than that. [than having a fulfilling relationship with somebody, i don't say it's not important, i said it's not the most important thing, don't put words in my mouth young man/woman!]
Love sickness is (metaphorical) like when you haven't slept for days and you're used to the exhaustion and don't even pay attention to anything else, you only want one thing - to get some sleep - your whole being is begging for that, so the tiredness could go away, and you could return to your normal function; but you can't sleep now because the cops have arrested you for molesting children, first: luring them into your red candyvan, then seducing them with chocolates; moreover, sleeping in the questioning rooms has never been comfortable.

That's how lovesick people feel. Er, maybe except the last part.