Need help with achievements Love Wolf and Party Alien. Several days ago I have added four friends and all of them have already added me in return too. But I didn`t still get the achievement. What to do else to get it? Could anybody from admins explain me what to do else, please?

Could anybody expleain, please, how to get the achievement Lone Wolf. I have added already two friends, but didn`t get the achievement. One of them has added me too.