I wasn't the shyest kid but when I moved from my tiny village to a big city, it took me a good 2 years to find girl friends. Those 2 years from 12-14, I hanged out with my older brother and his guy friends. Here's what I learned from those years:

1) Self-Confidence. Guys, even the average ones, think they are God's gift on this earth. That they deserve the best and only the best. You should too, cause you actually deserve the best.

2) Boundaries. Guys say what they want and don't let you cross their boundaries.If they say they'll never do X and you suggest they should try X, it's a guarantee they'll never do that. Don't let anyone push your boundaries, always put yourself and your comfort first.

3) No customer service voice at others. Specially at random male strangers, you don't own random guys anything. Kindness is good of course, but If you naturally aren't that jolly, there's no need to pressure yourself to appear that way.