Detecting Signs Of An Affair

I remember my friend giving me different signs of an affair. I did not believe her then. Everything used to be so perfect for me, my husband, and our kids. However, I have noticed that my husband has become more distant to me and the kids. I am very concerned about it not just because I love him. I would not want my kids to be affected with our situation. Everything my friend told me is back in my mind, and perhaps she is right. Perhaps I would have to look for signs that he is indeed having an affair. I am crossing my fingers though, and I hope I can prove myself wrong.