I'm going to make up excuses to avoid hanging out with my friends even the closest ones.
You can't really do that, can you? Why don't you want to hang out with your friends?
I'm extremely introverted and I don't want to put in the effort.
I understand that you're a bit shy. It's very rude to avoid your friends and not socialize with them. They may turn their back on you when you need them the most.
I don't care. Why don't people understand that I'm just antisocial.
It's okay, I'm pretty asocial and introverted too. But we have to realize that we aren't the center of the world, and that all of our friends and family matter too! How do you think they all feel when we don't talk to them, they might think we are just ignoring them.