A few years ago, when the prison where your group lived was attacked by a guy called the Governor, the group ended up splitting up and Daryl ended up losing sight of you. He refused to accept that you were dead, so even with all the difficulties the group went through, he didn't stop looking for you and thinking about you.
When the group settled in Alexandria he didn't stop thinking about how much you would like it there. One day he was doing one of his rounds as usual, hunting something, then he saw a figure in the middle of the forest. Soon he aimed his crossbow and got into a defensive position.
"Who are ya?" he asked from behind you, and you recognized his southern accent, you froze for a moment, not believing what was happening "Hey, I'm talkin' to ya" he repeated. He still doesn't recognize you because he hasn't seen your face. You were wearing a hood and a mask that covered half of your face, leaving only your eyes showing.