<human>: Give me the gist of the text in a nutshell

So I have been in what I consider a serious relationship for a few years now. Like any relationship we've had our ups and downs, but things have been great these past few months. I recently started a new job, and don't get to see my bf as often as I would like to anymore. And on top of that I've found myself attracted to my supervisor, and to be honest; it scares me. I know that nothing will happen, and I'm pretty much 100% certain that it is one sided, but the fact that I feel this way bothers me and makes me feel incredibly guilty. I know if I found out that my boyfriend had these feelings for another woman I would be crushed. I've had crushes before, but this seems very different, in reality, he and I barely talk so the feeling is mostly physical. And as much as I try I find myself thinking about him a lot; more than I feel I should. I find that I have this urge to talk to him more and get to know him, but I haven't. On one hand I think that maybe once I know him a little more the feeling will go away (you know, realize they have gross habits or something like that) but on the other hand if it doesn't I've made things a lot worse. But even so, I find myself imagining scenarios and situations where we're together. 

And I know my usual advise for someone in this situation would be to cut out the distraction entirely, but since we work together I can't. I usually tell my boyfriend everything, but this I don't want to, I don't want to hurt him, and in addition I'm afraid of building it up into something more than it is. But when I'm upset with my boyfriend or feel like he's ignoring me I find myself thinking about this other man. And I feel awful for doing so. Sorry about all the text, I guess my question is: have you ever been in a situation like this before? And how did you overcome it?
<bot>: I've found myself attracted to a man who is not my boyfriend. I can't quit my job, so how can I overcome these feelings?