Am I crazy or is he cheating????

I started dating the man of my dreams almost a year ago on http://multiraciallove.com, and we now live together. For the most part our relationship is perfect, but I can't get over the fact that he's been very promiscuous in the past. He's had way too many casual ual encounters before me, which leads me to believe that he may not be ready to give up that kind of lifestyle & focus on our "monogamous" relationship. I have no concrete evidence that he's cheating, but he does occasionally get phone calls, emails & texts from women he's been with. He still talks to and occasionally has luch with his ex girlfriend, whom is the only woman he's had a "real" relationship with. He's always been open & honest with me, and says that when he is contacted by someone, he'll let them know that he's in a relationship & off the market, but is he really doing this or just feeding me some BS?multiraciallove.com