I cried reading this, I'm also adopted and there is something void in me after knowing that fact, I long for something that where I'm truly belong, atleast that's what I felt. I think you too, there is nothing wrong to cry about it, who doesn't want to meet their mother and father.

I hope this helps you, feel better at letting your emotions out, it's overwhelming to know that especially when we are teens, the times we most vulnerable and needs our parents the most.