YEAH HI PLEASE READ THIS: http://design.tutsplus.com/articles/10-drawing-myths-that-block-your-progress--cms-23892
As in please read it, don't skim it, it's got such great information on both how to become a better artist and how to treat other artists.
TL;DR: Saying "I wish I was as good as you" or "I'll never be as good as you" or something similar is not a compliment. It's a personal lament and many artists can do without it. Thanks.