I have a friend that I have known for many years, we've been close for many years. This friend moved from down here (South of England) to Scotland for a new job. I went up to visit about 6/7 months ago and hit it off with this guy who works for the same company as her. We got on and did get intimate on one occasion. After I came home we continued to text for a few weeks before it fizzled out. I was still keen but I wasn't getting very many responses from him and he eventually ended up calling whatever it was off. 7 months later, my friend has now told me that they are now dating, had been just friends for quite a while but in the last month or so have realised that they have feelings for each other after spending a lot of time together.
I don't know how to feel about this? I feel upset with her and am questioning our friendship? Should I be upset over a brief fling?