This sort of thing actually happened to me once as well. My best friend and I have been friends for...about 6 years now, and he thought I liked this one girl I was friends with. A few weeks later, I find out was messing around with her, AFTER he had thought I liked her. Didn't really matter though, cuz in the end ive been dating her best friend for the last 10 months :D
The "uneasyness" with my bestfriend just kinda dissipated after a while I guess. I was really mad a first, as I felt he had betrayed my friendship, but after a while it just dies down and he is still the same guy you wanna drink a few beers with.
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