Okay. Let me ask you first, why are you shy? Are you afraid about what people say to you when you speak? Or you're scared on your Aunt's/ Uncle's faces when Family Reunion day? That's funny.
Back when I was a little kid, I grew up with a family that was purely quiet. There's no room for a conversation. It's kinda less in conversation, more work.
In my grade school year I've never talked, that's why my schoolmate told me "panis na laway mo" (a tagalog language). My mouth automatically shuts every time I come to school. I have a teacher who's a bad ass for me, because, every end of the class, she's always calling me to summarize her topic. I'm not saying anything even if I understand the topic, and answer her questions. My shy typeness hits me so hard.
In mid-school. I learned to say "Hello" and 'Hi", just kidding lmao! I'm just saying those words to my friends only, it's all that I've got on my mouth, well shy type guy here.
Being in a teenager life you will discover a lot of things, like you'll be in love. But you are a shy-type person, so you may think that your crush doesn't like you back.