How do I get more friends using Facebook Advertising?

A couple of things…
1. Are you advertising a Page or your personal profile?
2. Are you testing many different images, with the same body, and a mix of different body text with great calls to actions? Such as “….Like this Page now!”
3. I would stay away from CPM until you prove through CPC that an ad works. Then recreate that individual ad as CPM and show it.
4. Consider your advertising frequency, if you are showing people the same ad many times and they aren’t converting, or if your CTR is dropping then pause the ad for some time and make a different one with the same targets live

And that is How do I get more friends using Facebook Advertising