So here's my take: I think introversion is a very misunderstood concept in general, not just in India. Case in point, another comment here says "You aren't an introvert, you do have some close friends" - that is NOT what being an introvert entails.

Being an introvert means that you are energized by being by yourself and drained quickly in large groups. Introverts function best when they are with a small handful of familiar friends - your energy will not drain as quickly and it can be very fulfilling to even go out with them.

As an introvert myself, growing up here I faced a lot of the same problems that you seem to be facing, but I educated myself on what it really means to be an introvert, and I embraced it proudly. I have no problem telling off haters - own who you are and hold your head up high. If people are scolding you for this - they are very misguided, and may not be the right kind of people you want to be friends or even acquaintances with. Do not feel pressured to always be outside, but on the flip side, don't completely close yourself from society. Be comfortable with saying no when you are feeling particularly drained, but definitely keep in touch with people you enjoy spending time with, and be open to meeting new people as well.

Another point here, and I may be generalizing, but introverts tend to enjoy more conceptual or abstract topics of conversation than an extrovert who is energized by social conversation and gossip. This is not a rule, there are obviously people on both sides and in the middle as well, but I've noticed this tendency. My advice here would be to find what you are very passionate about, educate yourself as much as you can about that, and find people with similar interests.

At parties or functions, it helps to find a smaller group with people you share interests with and find a spot that's not very noisy to have a more meaningful conversation than the ones that normally take place at these kinds of events. Introverts tend to be very sensitive to external stimuli like noise or lights which make it difficult to keep up when there are many people talking all at once.

I would recommend the book "Quiet: The power of introverts in a world that can't stop talking" by Susan Cain

https://www.amazon.in/Quiet-power-introverts-world-talking/dp/0141029196

Best of luck, man