Obsessed with someone not into me

You have two options.

1) Avoid her like the plague. Go places where you know she won't be, work on something, and within a week or so you'll forget about her.

2) Be bold and make a move. If it fails horrendously do number 1 and then try again.

Tell us more and we can brainstorm

NotGaryGensler

As the title suggests I'm obsessed with this individual. I think about them daily and get anxious every time I do. I don't even think I actually like her, but it stems mostly from the fact that she doesn't want me and that drives me to be like this. What can I do?

Stop being the caricature of a loser that obsesses over a woman you barely see who has made it clear they are not interested in you (that's just unsettling on multiple levels) and look inward to figure out why you have such weak mental. Desperation is pathetic and unattractive to almost everyone, she can no doubt smell it off you a mile away. If I were you I would delete this post and go sit in a dark room for a while to think about what part of me would make me feel this way, then snuff it out.

If you let your perception of women who don't care an iota about you rule your life it will be a deserved, miserable one of your own making. 

Message her and say “I’m totally not into you. Let’s grab lunch sometime.”

do you have bipolar or bpd?

Honestly, I think the matter to handle this is similar to any other addicition or obsession. You see, when you try to avoid concept or object X, that in itself places that object as the focus of your attention and provides recurring thoughts subconsciously. To move on, you have to direct that attention and energy to an outlet either in the short-term or long-term. In my view, you have two options, the first is to unearth the crux of your emotional quandry as to why you see a fascination with an uninterested individual more so from an introspective perspective and confronting your own subconscious thoughts towards her. The second is to direct the energy away through object or concept avoidance. If the underlying root is simply un-reciprocated lust, then it may help to try casual dating, if it's simply aggrandizing someone, then focus that energy inward to better yourself through your physical and mental health. Finally, if you'd like further advice or insights more than my limited understanding can provide, conselling services can work wonders in these instances. 

There are plenty of women who won’t like you. Focus on the ones who do. I promise you’ll feel better overall. I’ve had a couple moments where I got way too into a girl who just didn’t feel the same way. It’s unnecessarily painful. Approach with an abundance mindset until you find a really good girl.