UGH!!!

Why does life have to be soo complicated....................Like the past week i made a descision where i hurt someone that i didnt mean too but idk, and like everytime i see him in the hallway he has that look on his face like he is hurting but everytime i try an talk to him, he just tells me that he has alot on his mind, then he just smiles. But i can see the hurt behind his smile =( am i really a horrible person??? maybe i am idk i just cant do anything right i guess