Dude, don't worry… I'm 19 too, and i can say to you that everyone have their time.
I was devasted when i'm 18, because i was virgin, and i felt horrible, because all my friends (straight, and i'm still today discrete) had girlfriends or a active sex life.
I was shy too and i lived in a small city. One day, I traveled to pass a week in another city in a friends house. He went to work all day long, so i decided to walk around and meet people.
I met an older guy (he is 32), a very nice person, via chat. I said to him that i'm intrested in sex, and he asked me to went into his house.
I was terrified, i was like: omg he'll kidnap and kill me. But when i met him personally, it wasn't so bad.
I had an awesome sex, omg... I went into heavens. I realised that fuck loose virginity early or after. I was ready for it, the sex doesn't happen with one person, you know that you're prepared when you have the right time and the right person, or any person inclined to it.
You feel ready and he or she wants? go for it