<human>: Can you provide a brief overview of the text?

So I have been in my current relationship for almost three years now. For the past few months, I feel neglected in the relationship sexually/romantically/emotionally.  We've talked about it in depth, and we're trying to work it out. 

Meanwhile, there's another guy (30m) I recently met who works at a business next to mine. I rarely feel an attraction to guys, especially while in a relationship. (It's like a switch flips and I'm blind to other men.) However, I've developed a crush on him, and recently found out the feeling is mutual. Now I constantly have that "what if" in the back of my mind, and can't seem to shake it.
<bot>: I feel these thoughts are completely unfair to my boyfriend and it's unhealthy for our relationship. I've never had this feeling while in a relationship, and looking for a way to deal with it.