The reason why JWs do this is to show their fake love that they're supposed to have, and be "encouraging". I've had my share of the "we missed you at the meeting(s)" comments. After a while, when my meeting attendance went down my 50%, I had less and less people saying this to me. It almost seemed like they were getting tired of telling me they missed me. Then, when you haven't been to a meeting in a few months, you get people saying, "It's good to see you here!" They have no in-between statement to say.
When I quit going to meetings and I'd run into a JW, they would say "Remember all the good times we had out in service?" The elder I studied with called on me one day, and told me he loved me. Made me wanna puke.