Apply the friends first rule sweetie. Everyone has different likes and dislikes. Your still young and shouldn't be worrying about boys yet. It's a time to find who you are as a person and a young lady. My daughter is the same age and this is the advice I gave her.
Im 26 and im single but have always given advice to all my friends. And people that need it. At the age of 19 i dated this girl for 5 years and was still giving advice. The problem is that us the poeple who give advice never listen to their own advice and it just didn't work out. Im single now like i said and i keep giving advice still. Just be patience and you will see that sooner or later it will come when you keast expect it. And it does take a lot of effort for a girl to ask guys out. Props to you. Good luck!