1- I would say the following. I travel a lot and I find it relatively easy to make friends. It's important to be honest to people around you and assume that they are your friends already! How do you talk to your best friend? Do you make shocking jokes which would be offensive
3 - That's what people think when they say "just be yourself." Also, let's say that you love to talk about politics with your best friends, just make a comment to random people that you think X is a idiot for Y etc!