The easiest way to accomplish what you want is for your friend to find a post of yours on their home page (newsfeed). If they hover the mouse over the post, a little arrow will pop up in the upper-right corner of the post. If they click that, a little menu will drop down. They should click "Hide" and that will hide all of your stories from their newsfeed.
A further option will then appear saying "Change what updates you get from brassplyer" and they can click that to allow things like status updates, photos, or other stuff to appear while blocking your other posts from appearing!
It sounds kind of confusing, but I promise it isn't!
Cubase 6.5, mehh laptop, tascam 1641, ga pre-73, sputnik/mk4/re320, KRK rp6g2