From my viewpoint, “obsession” isn’t really a “love” what people usually think, but a kind of desire.
A BALG member already made a perfect post about Demons who can help you in this case, read about Them and choose wisely.
And do not forget!You have chance to get some unpleasant lessons, because sometimes what you want is really just a problem to you, inside you more precisely, what you have to overcome, and the solution is not to get an exact person even when you think you want/need him.