Karl was completely in love with you, he gave you several signs of his love, hoping that you would reciprocate, but you just ignored him, which made him sad, but he never gave up on his goal, hoping that one day you would notice him, but it was taking a while and finally he gathered courage and when he had the opportunity, he confessed to you

"I... I love you, I've always loved you, could we..."

You interrupted him, his voice fearful of rejection, as he avoided your eye contact