I just come home from vacation and I’m struggling with what to do

I just came home from vacation in Egypt, and I had a great time. It was so peaceful at the hotel, and it was a much needed break. I saw a boy there who seemed to be around my age. He was very interesting, and while I was there, I was debating whether or not I should talk to him. He was Russian, and I am Norwegian, which was holding me back. He was often with his family, and I never took the chance. When flying home again I felt deep regret. We could’ve had a nice friendship, as I saw we had many things in common. It was nice to see someone like him, as in Norway people are dressed the same and act almost the same. It was refreshing to see someone like him. Now I have to keep living with the regret that I didn’t talk to him. Also, the weather is such a drastic change. In Egypt it was warm and nice, and here in Norway it’s cold and windy. The upcoming storm isn’t helping much. I keep crying, but I’m not quite sure why. Does anyone have any advice? Any tips or tricks? I’m sure anything will help. I’m a little miserable right now.