Do you think its ok being like this?
it's obviously wrong.
you should immediately commit suicide lest your abominable nature begin to rub off on the rest of us alpha-dogs.
We might be a liability to the society but maybe we can be useful to it. We might just have an idea to stop all these maddness of war and corruption. Many great people were introverts once. In the end, it is you people who should give us more self-esteem instead of denying our existence.
If I were you I wouldn't even worry about justifying your existence to people like him, bullies/trolls aren't worth your time. At the end of the day you are here whether he likes it or not, 'alpha' s***s like him will just have to deal with it.
As for your introversy, there is nothing fundamentally 'wrong' with it so to speak, but it'd help your opportunities in life to get out there and socialise, you don't have to like it, but it serves a purpose and gets you to places in life, so if you do make the move to be more sociable, do it for yourself, not because the 'normal' people want you to. I'm speaking as something of an introvert myself, I've started socialising more recently and have picked up social skills, I still don't like it and prefer being by myself for the most part, but just think of it as a way of helping yourself, don't worry what anyone else thinks about it.
Like I said it's not wrong to be like this, it's who you are so don't beat yourself up for it, it is no way productive. However given that you're surrounded by social beings it does help to adapt a little and play it their way, for your own benefit more than anything, it's your choice though whether to you want to and how far you want to go with a social life, if you don't enjoy it then don't socialise any more than you have to, just do it for the perks.