How do you handle an obsession over somebody who is taken?

go out, meet more people.

that's all there is to it. and remember that how much of this obsession is self created.

All of it.

take only facts into account and trust me, whoever it is- cannot possibly be as great as u've made them out to be in ur head.

how i know that?

whatever notions you have would have to be unrealistic, so as to create an "obsession".

if all else fails i have a quote from my Biology professor.

"whenever you start idolizing someone-remember- they sit on a toilet every morning and crap just like you, and everyone else."