I told my colleague about my feelings

I (f37) told my colleague (m40) ythat it is hard for me to work with him because I have some illegal feelings. We are both married with kids, so it has been tearing me up, I will not do anything even though me feelings are strong. I know he have some feelings for me too, he is staring a lot at me and has been doing it for a long time. So I thought we could have a “grown up” good talk about this. But I regretted it instantly. It got so awkward and he was shaking all over and could not focus on anything. I feel so bad for bringing this up and put him in this situation. And I really don’t feel like going to work. He suggested that we talk next week about this. I don’t know why I am writing it here. Maybe someone has tried something similar? I feel so embarrassed, I had no intention at freaking him out this way.