Obsessing & Others

I am bipolar, and I have always had a problem: I obsess over the wrong things. Usually it is a fight or something someone said to me, but other times it is over a particular person. I have a boyfriend of many years, whom I love more than anything, but I obsess over people that I meet or have met, and they consume my thoughts. I find myself researching them, even. There is a particular person right now, who works in the building next to mine and I have pretty much "watched" for the last few years. I have spoken with this person a few times, making small conversation, sometimes purposely finding a way to be seen bu them, to be outside when they are outside, etc. I have never tried to actually to pick this person up, give them my number or ask for theirs, thought it was mentioned to a mutual friend that I thought they were cute. This is not new, I have done this for years, despite the number of other boyfriends I have had. I find one person and I just obsess. I do anything to think about someone else, something else, but the particular person of the moment always pops back in. I love my boyfriend, I want to be with him and not this other person (I would pick my boyfriend in a heartbeat). I obsess over the wrong things, like I said, fights (that's a whole different post!) and people. I know that obsessing is part of mental illness, but I am hoping someone knows how to take your mind off things like this and how to stop obsessing over the wrong person.

This has nothing to do with OCD, at all.
Head over to the BPD section because that is the only thing that comes to my mind when it comes to obsessing with people.

I'll request they remove it and I'll post it in the right area. Thanks.