I have a piece of paper but is empty

After sometimes get along with her, chat with her and hang out with her, slowly as time goes on, feeling toward her started build inside my heart. Feeling toward her is hard to confess with her cause lack of confident with myself, trust still not really impress by her. As time goes on, don't know why thing started to change, the way she treat me not as friendly as the starting we get along. Keep thinking what mistake I did but I just can't figure it out. Out of sudden, surrounding around me just went quiet, empty and cold...this feeling is so terrified and hurts..............