Aud, my answer is probably not what you believe you’re looking for, but it might be helpful to think outside the box. In your post, you refer more often to yourself than to you friend. That seems interesting. You say your friend needs to “broaden their horizons”, yet you are limiting yourself to only two choices, "help" (actually, you mean "not helping" if you don't lie) versus “lie” (is that really the best way to help?). There are almost always more than two choices in the real world, and that’s probably true in your situation.