When dd2 started in year 7 she buddied up with another girl. The mum was really friendly and added me on Facebook. Since then dd and this girl keep falling out, mainly because she didn't want dd to be friends with anyone else. Now the mum blanks me and is very friendly with another mum (also on my Facebook!). Today they both absolutely blanked me, so clearly they've got a bee in their bonnet about dd or something she's done (she's not done anything so she says and seems very genuine and straightforward but I know mums are often the last to know!)
Anyway, I feel uncomfortable having them as Facebook friends while they are being so unfriendly in RL. It seems childish to block them. Is there an alternative?