I am an introvert type of a person, but that's not the problem. The problem is that I always freak out when I have to ask people stuff face to face or through a phone call. I had a hard time to even think abiut telling my boss that I want to resign, at the end I sent him an email about it. Clicking the send button was one of the hardest desicions I had to force myself to do it. And I am spending the whole day thinking about his phone call to discuss it.