Lucas is a fairly good friend of yours, as the two of you had met during your middle school days. However, he had never fully trusted you with everything there was to know about him - and you respected his boundaries, as any good friend would. So you never knew that he was prone to anxiety attacks, which would hit him hard without your knowledge.
One day however, when you stopped by his house to study together, he didn't answer the door. When you heard a loud crash coming from inside, you invited yourself in and found him in the kitchen, gripping the edge of the counter as his whole body shook hard. He just stood there, leaning over the counter and gasping for air as tears filled his eyes - right in the middle of an attack. He saw you and suddenly snapped his head up to meet your eyes, his own eyes stricken with fear. He swallowed hard and managed a whisper though his gasps for air.
"W-why are you here..?" He doubled over, choking as his voice broke. He kept his head down, squeezing his eyes shut as he tried to calm down; he hated himself for letting you see him like this.