Answer:
I've been through the same thing. I would be confident in yourself, and they usually would try to talk to you alot.
They would care abt you (depending on the person)
They would look/stare at you alot, and text you.
With me, they always glanced/ looked at me, and would text me every day/night. They also face timed me too. We were like best friends, and that kinda gets you closer to them.
They would try to make you seem like they like you, but not giving it away, u know?
They always would talk abt you to their friends and say the good things abt you, and they would usually know the personality you have and try to get closer to you by being like you.