and more than half of the ones that are 'blood' sure as hell aren't my family. not loyal, not loving. and definitely not caring, so they are not my family. i have more friends that are closer to being my family than my relatives are.
Some of my genetic family, I wouldn't even call family. I'm thankful for my best friends from school, work, etc. Those are people who I consider family. I'll be forever grateful to be able to talk to my "family" about anything, at anytime.
I wouldn't say "enemy" per say, but yeah. Do not trust people who remain "friends" with person(s) who want nothing but the worst for you and or your spouse. You can forgive people without allowing them back into your life.