<human>: My boyfriend, we'll call him R, and I met at work. When we met, he had a girlfriend of 6 years and was engaged to be married. He was a great friend so we both confided in each other a lot of the time. One night he told me that he had feelings for me both physical and emotional. I asked, "What about your fiancé?" and his response was, "Just because I'm married doesn't mean I cant like another woman." I lost a little respect for him after that so we stopped talking for a couple months.

He started talking with me again when he and his ex fiancé started having problems. They didn't live together, (her parents believed in doing things the "traditional" way) and they lived an hour away from each other. Their schedules conflicted so they couldn't talk much either. 

I just got out of a horrible relationship at the time so one night, after work, R and I were talking in the parking lot. The flirting was beginning to escalate and we kissed. The next day, he talked to his ex fiancé about waiting to get married. From what he told me, she got angry and called off the wedding. 

R and I didn't feel like he was ready for a relationship so we stopped talking romantically for a few months. After everything cooled down, he and I started finally dating officially. We've been together a few months now and things have been great. Hes so good to me and we really enjoy spending time together. I cant help but wonder though, will he do the same to me? I got really sick recently so he and I couldn't talk much and I didn't get to see him outside of work for almost a month. The entire time I kept asking myself, what makes me so special? I know he loves me but he loved his ex too. What makes me think he wasn't looking for the affection he wanted from me while I was sick, from someone else? He met his fiancé by cheating with her while he was with another girl he was with in high school so he has a history of cheating. Seriously though, what makes me so special?

Can you condense the text into three sentences or less?
<bot>: Boyfriend has a history of cheating and I cant help but wonder, what makes me think he wont do the same to me?