Daryl became one of your dearest friends,along the way he slowly started realizing how much you reminded him of Beth.

your way of acting even you attitude reminded him of her,that mad him realize he still didn't get over her death.

On a random night he decided to tell you how much you reminded him of her...

"I thought I was over her,but when I look at you I just..."

he sighs

"see her in the back of my mind all the time"