Yeah you can definitely fake it. I'm a natural introvert and unless forced out of the door would naturally just stay in on my own all day, it's just the state gravitate most naturally to.

However it's easy enough to fake socialbility when I have to.

One of the best ways is through reading books on psychology and personality.

Not so much so they can tell you how to behave, or ways to fake your personality but rather that by, for example learning how to speed read people, when you meet someone you will be more focused on what they are saying and trying to work out what kind of person they are.

In other words it takes the focus off of you and makes people interesting.

If you are genuinely interested in someone, even if only because you are trying to see where they fit on the Myers-Briggs Type Indicator scale and whether for example they are an ISTP or an ENFJ type person, it will take your mind off your own introvertedness and put the focus on them.

Plus if your job in any way involves sales you should read through the two classics 'How To Win Friends and Influence People by Dale Carnegie, and Think and Grow Rich by Napoleon Hill.

I like to read books on personal relations, mainly for the reason above, trying to categorise people makes them more interesting to me.

Doesn't even matter if the interperation is accurate, the point is it makes the process of relating to them more interesting and takes you from focusing on yourself to focusing on them.

Just make sure you don't a tell a stranger you have assessed that they are a pessimistic, passive aggressive, judging narcissist because it might not go down well