Feelings?

Weird things happened with the Boss last night. The night was going really well and I was having more fun than usual. The Boss was making his usualy cheeky comments and we had a couple of dances which involved some lingering glances and wandering hands but nothing more. Then later in the takeaway, for reasons unknown even to me, I decided to tell him that I had slept with the Boyfriend after our naughty taxi ride the other week. I was taken completely by suprise when he just walked away and got into a taxi without saying anything else to me. When I got back to my friends house he text me asking if I was home ok and i replied to see what was wrong. In the following texts he told me that he hated it when he saw me flirting or kissing other guys and that the thought of the Boyfriend touching my body bothered him more than he thought possible. He then went on to say that there is something between us that we can both feel. It was nothing like the usual flirty texts and neither of us were particularly drunk. Now I'm more confused than ever, I really like him, as I'm sure you know by now but I do love the Boyfriend. And to make matters worse his girlfriend is pregnant, although she is having an abortion.
Is it just complete stupidity to continue in this weird situation? I'm happy though, it's exciting and dangerous and there is nothing I love more than those two things.