Manic obsession 

You feel high whenever you see or think about the person because they are so hot. You tend to get hyper fixated on the idea of him rather than the reality.

You feel manic obsession about a guy who doesn’t care about you

Manic obsession by Pasty2021 December 20, 2020

Proximity Obsession 

Compulsive preoccupation with a fixed idea, feeling or emotion, often accompanied by symptoms of anxiety when close to a given person or thing.

1. When a guy talks to a waitress at a bar and she asks him what he would like to drink, that guy then has a proximity obsession and thinks he has a chance to score because she talked to him. 2. A wanting for an item that is within your immediate vicinity but you had no desire or wanting for it otherwise.

Proximity Obsession by Brad Humphrey March 25, 2006

obsession

ob⋅ses⋅sion  /əbˈsɛʃən/ Show Spelled Pronunciation uhb-sesh-uhn

–noun 1. the domination of one's thoughts or feelings by a persistent idea, image, desire, etc.

Karls current obsession is to get a new computer just because Larry has one and he keeps staring at computer hardware web pages.

obsession by Firefoxx65 February 23, 2010

obsession

someone who is sickly addicted to thinking about you and what you are doing, and making everything you do about them.
they never get enough of the thought of you in their head, it’s never ending.
they’re obsessed.

joan has a complete obsession with gresa did you know?

obsession by ahahhaahdidilie April 4, 2020

Obsession depression 

The state of mind you fall into after obsessing about something for so long that when you finally obtain/achieve it you are left feeling hollow rather than satisfied.

Man, my mate jake has been obsessing for so long about getting a new car that he's suffering from obsession depression now that he's got it!

Obsession depression by NFC1 October 1, 2010

Obsessioner 

An obsessioner is a person who obsesses over things, particularly Harry Potter related things.

Pippi is a Harry Potter obsessioner

Obsessioner by Person say hello August 16, 2009

yae.miko.obsession 

the hottest person alive ❤️❤️❤️ @fliptf

omfg i love yae.miko.obsession

yae.miko.obsession by deez bals April 23, 2022