Re: What if you like a shy girl?
If you like a guy who is looking at you, make eye contact and smile. If possible, say “hi” and introduce yourself (if you two haven’t met already). Again, none of this is rocket science. It’s no different than making friends with a girl. When you meet a stranger who seems nice and who you want to be friends with, you smile, introduce yourself, and ask questions to get to know the person better and try to find stuff in common. Every relationship (aside from totally blind arranged marriages) starts with a friendship.