A crush at work

There’s this new guy that started at work. He is so cute and we have so much in common. I don’t get nervous with any other guy at work only him. He’s in a relationship and has a child with that person and im also in a relationship. I know it’s crazy but I have a crush on him and I have never felt like this. I don’t even feel like this around my bf. I check to see if our schedules match, and I get so sad every time I leave and don’t see him for days. My cheeks get burning red and I get super nervous. I don’t know why I’m feeling this!? The feeling won’t go away! I don’t think anything will ever come of it. I’m just so confused why I’m feeling this. The only thing he told me the other day was that he was going to break up with his girlfriend because she cheated on him and he wanted to know what I thought. Which I thought was really blunt considering we just kinda met. I thought this feeling was going to go away by now. I’m way too shy to say anything to him. What does all this mean???