At first, I kept FB for people I have actually met face to face. Then all my high school friends started finding me. Then people who have seen my band. Now I have now idea who I've met in real life and who's and internet acquaintance. So when I get a friend request these days it mostly depends on who our mutual friends are. It's sort of like the mob. Are you a friend of mine or a friend of ours?
Concern yourself less with love and more with loving.