I fell in love with my best friend of 6 years and 1 year ago we finally admitted our love for each other. He dated another girl before me and broke up with her when he realized he loved me instead. I was dating a mutual friend of ours at the time, but broke up with him around the same time. The guy I broke up with was a nice guy before and during the time we were dating, but since I broke up with him almost a year ago he has been bitter and mean towards me. What can I do?