My Boring Job Turned into a Confusing Seduction

I'm really having one of those weeks at work. Everything feels tedious and unfulfilling, even the coffee tastes like water. But I think it's gotten to me because last night my partner, who is supportive but not into this particular kink, noticed something was off with me. It started when I realized I had a crush on our new IT guy. He's really good at his job and always has a friendly smile for everyone. But what got me was that he seemed to pick up on my vibe or something because after a few days of subtly trying to catch his eye, we ended up talking about some...well, let’s say more intimate subjects than just office supplies. It wasn't just small talk. We exchanged stories and even started messaging each other in private chats that felt too close for work colleagues but not quite personal enough for what I was feeling deep down. And when it came to my partner last night, there was this...this tension in the air. It wasn’t really about them at all, it was like all of a sudden I wanted something more intense and different. So we kind of danced around each other trying not to make things weird but also wanting to explore where these feelings were leading. And then he said something that made my whole body shiver, the guy had been thinking about me in ways I hadn’t even dared hope for, and now I’m stuck between being excited yet terrified. I’ve always kept a bit of a distance from work stuff at home, but lately it’s all mixing up. Is this normal? Am I crossing lines that are better left unspoken? Any thoughts on how to handle this without messing everything up?