Anyone else feels left behind?

Today I didn’t feel like going for an evening walk, and I wanted to have a random cup of tea with a close friend who used to live nearby, and that’s when this crushing loneliness hit me. This friend recently moved to Bangalore for a job. I guess I haven’t fully registered that in my brain yet. All of my other close friends have left the city. Some are trying to find their fortunes abroad, while the rest are in Bangalore. I’m working for a remote-first company and there’s not much scope of fraternising with colleagues either. I don’t even want to move to any other city because it’ll be an effective pay cut as I’ll have to start paying rent. I’m quite an introvert and I have no idea how to make new friends as a 28y/o man. Has anyone else felt this way? How do you guys cope?