So another Mum I knew started blanking me several months ago. So, for example, when I am in a small group and she joins the group, she ignores me even when I say hi - doesn't answer or anything and cannot look me in the eye. She also has a habit of completely turning her back on me when we are in a group so I am physically excluded from the conversation. If I am at the school on my own and she's there too, she goes and stands somewhere else.
I had vowed to ignore her back as I couldn't be bothered but I find it really difficult to do in practice - seems so petty.
Recently we were both at another Mum's house and again she ignored me when I said hi directly to her. However, later on, we found ourselves just the two of us so I walked straight up to her and started talking and she talked back fine etc. But I know next time I see her she will blank me again - it has happened before.
It's really weird and I don't know what to do. Any advice?