I would think it would be a bit weird if my therapist ever said something like that to me. Those I've had have said a lot of good things about me & pointed out work I've done or things they love ABOUT me, but I would definitely think twice if I ever had a therapist say ''I love you''.... I don't really care what context it's in, that seems to be blurring some lines to me. That's just how I would take it though, some people wouldn't mind but I just think that's a bit too intimate for a client-therapist situation....