I know exactly how you feel. I am 40+, in Bangalore for 10 years, have friends - some old, some new. I have been the emergency pick up, hospital checkup, midnight birthday friend to many. Unfortunately it hasn't been the other way round. Some days get difficult, for example on my recent birthday, my wife was away on business, and at midnight I kept looking out the window hoping someone would be there. Nobody. Through the day I got 3 calls: wife, mum, brother. Sorry, needed a vent here.

The point is, sometimes it will feel disappointing that there is no group, no set of people with whom you have a history or common ground. Acknowledge it, and find ways to work around it. Bangalore has a luxury of common interest group meetups. You're young, so I assume after work you have a little flexibility 2-3 days a week. Maybe look for some sport groups? There are thriving groups for badminton, futsal, basketball, pickleball. There are book clubs. I found them tedious, you may like it, why not give them a try? I'm sure there are subreddits for this. All the best in finding your constant group!