<human>: Can you give me a shortened version of the text?

I'm an F in my late 29s, he's an M around the same age. I've been at this job nearly five years; he's been here almost a year. I have a strict no-dating-coworkers rule for myself, so it never even crossed my mind until recently that I might be into him. Honestly, I didn't know what to make of him at first (beyond thinking that he was kind of goofy); however, in recent weeks I've helped train him on some tasks and talked to him at some work functions, and I've come to really appreciate him. We have similar interest and senses of humor, and he's always got this cheeriness about him that's really endearing.

He was out sick all last week, and when he came back Monday, I was taken aback by how *good* it felt to see him. I hadn't realized how much I missed him, or how much I've come to enjoy being around him - it was a surprising revelation. And now I get stomach butterflies when I see him, so that's a thing.

So: the catalyst. I'm within days of finalizing a new job at a different company in the area. While I'm excited by the opportunity, I'm realizing now that I'm really going to miss seeing this guy. I wish I'd gotten to know him better while we were still colleagues, and I regret being so slow to realize I liked being around him. On the flip side, once this is done he's no longer a coworker (and thus no longer off the table, dating-wise).

So: once everything's finalized and I've given my two weeks, should I tell him all this? Do I just ask him if he'd like to go out sometime, or give him my number? It's been a long time since I've been interested enough in a guy to feel like this, and I'm sort of rubbish at it all; plus, he's such a pleasant dude that I'm hard-pressed to tell if he reciprocates these feelings at all. Help me get my head on straight about all this, Reddit!
<bot>: Sudden revelation of crush on coworker compounded by imminent career change. Do I keep my peace, or take a leap?