My boyfriend and I have been dating for 16 months and we are very serious. Last night His best friend, who I see as a friend also, and I had a three-some. My boyfriend seemed really happy to be doing this, smiling, participating..ect. But I have some concerns; This morning he was not acting as cuddly as he usually does. I'm afraid that maybe he regrets it or is shocked, but how do I approach him, or should I not approach him and just continue on with him.