Most Helpful Girl
Well what do you like? What music/ movies/ comics/ games etc are you into? Find stuff in your area. Everybody has things they geek out over ( even us girls) and if you start getting out there and going to/ participateing in hobbies and activities you like, you'll meet others who do as well. Maybe even attractive girls who do (or people through whom you can meet said girls). Also, when you're doing something you enjoy it makes it SO much easier to have conversations without awkwardness or pressure! Don't be ashamed that f your shyness, but don't let it isolate you either. If you find a place where you feel comfortable and can do something you love chances are your love life might improve along with your love of life.
Most Helpful Guy
Hate to say it but you gotta get out of your comfort zone. You need to hustle and push yourself hard mentally by challenging yourself to at least approach and talk to a girl once a day.
It'll be difficult, and you may want to shut yourself in. But think of it as a muscle you need to work out. The more you practice pushing yourself out there, the more you'll feel at ease being around others. Doesn't mean you have to be an extrovert and be a party person or anything. You'll learn to be yourself, but unapologetically and without worry of what others think of you.
You just have to remember. If they don't like you, then it's great for you: you don't have to waste time with those unworthy of your value.