Why do you miss him? Why do you wish he would come back?
What did you really know about him at this point to warrant those types of emotions? Those are strong feelings to have for someone you dont really know.
I can understand feeling a little bad cause maybe you feel rejected. But that should be it. Amd not even, cause rejection isnt necessarily about you.
And i dont mean to crticize you or belittle your feelings. Because i know you feel things very deeply. You are a passionate person. But i think you need to wait to invest those feelings in soneone that prooves they are worthy (its what every one here is saying).
Date for fun like V. Says and see how it evolves before going all in emotion wise.