<human>: I've been going out with a very good friend since January [m23] (I've known him a year and a half) and although I love him for his personality (he is wonderful) and amazing sex, I have a secret. I've been in deep, uncontrollable limerence [ with someone else [m24], since August of last year.

The friend I'm in limerence with, has no idea, or at least I don't think so. I have been avoiding all contact with said person for the past few months. He contacted me on facebook in a friendly manner recently 
I do think I'm really falling for my boyfriend, but I have constant thoughts of this other friend in my head. I found out his username on a forum and I've been sitting reading his posts for a good few hours. I was fairly good friends with this person, but was too shy to make a move.

It's ridiculous but I can't stop. Does anyone have any idea about what I can do? I feel seriously guilty that it's not my boyfriend I'm obsessing about and I know it's unhealthy. I'm also concerned in case I go out, meet this person on a night out and end up doing something stupid.

This guilt is keeping me up all night, as are thoughts of the person I'm not supposed to be thinking about. I feel like I am going crazy here. The only answers I have seen online are those about telling the person about your feelings but I cannot do that. I honestly can't break my bf's heart like that, for he is wonderful and I get a taste of what 'true' non obsessional love is like with him. I know it's more rewarding in the long term but I can only describe my behaviour with this other friend as looking for a buzz. I know it's dopamine related that's for sure.

please help reddit. lil.

(I have OCD. This does not help at all.)

[b]

Can you succinctly summarize the text in 1-3 sentences?
<bot>: In obsession with friend that is not my boyfriend that will not go away, have been feeling like this since last august, help please.[/b]