Should I Dump him?

My boyfriend and I have had an incredible bond for over 8 years. Even when I was with someone else, married, and gone 16 months to Iraq, we always had this bond. Now I am single and at first it was paradise. Now I notice he is grouchy, and he still has the crappy disposition that always pushes me away. I got married for the wrong reasons to my daughter's father for 3 weeks. While I was married he asked this woman out, she told him, No he was way to old for her. Once or twice a week they talk. I overheard him joke with her about sharing (pertaing to sex) with him, when she mentioned her boyfriend. Then before they hung up, I heard him laugh and say I love you to her. I grapped my stuff to leave. He told me he loves her as a friend and he would put her back on the phone. He pleaded that he loves me and I am his lady. But he seemed happier on the phone with her, then the grouchy man I have been seeing lately. What should I do?

im pretty sure he likes her more than u, NO offense, I would dump him
GOOD LUCK WIT THAT