How do I act towards my Fiancee now?

There was a major accident in our city. A drunk driver ran over and killed a very close and dear friend of mine. I might be wrong, but I truly think that I still loved him. I love him more than a friend. I had known him for over 6years now. We talked to much back then and i felt something for him...he knew but he wanted to know me more before we continued. However, he loved to date and cheat so that kept me away...He eventually started dating someone and became committed so i did too...I went on and i meet my now fiancee...Me and my fiancee have been together ever since with the exception of 4months during these six years. We broke up and during that time me and my friend rekindled our friendship...we txt and chatted..and once in a great while talked on the phone...by now he had been married (he claimed divorced but im not sure he was cuz according to the obituary he was still married..its a long story...but anyway. I do love my fiance and he supported me through it ...