Dear Steve and Shirley, I've been in a relationship with a married man for ten years. People think that all mistresses have low self-esteem. However, I don't. I am very confident and I love everything about myself. Since I've been with my guy. I have only cheated on him once and I told him about it and promised him that it wouldn't happen again. In the first few months of our affair I tried to end it but both he and I were already in love. He is my best friend and he has my entire heart.......