Most Helpful Girl
Yeah I'm having the EXACT same problem as you here. He's outgoing and bubbly with other people, but the minute I try to talk to him he closes up and barely says a word. One time I even spent a random night with his friends and him. His friends chatted away and he BARELY said a word.
We've still barely spoke on times we've spent together. We've kissed too and he's admitted to being interested in me to his friends, yet when we run into each other, he starts with this weird behaviour! So annoying.