I had a girlfriend/fiancee she never put pics of us on her facebook and Instagram - in fact when I invited her she blocked me 馃樁 she will put pics on her story which vanish after a period of time. When we got engaged she never even put pics of the ring on her facebook. I then found out she was with another guy who was on her facebook - this is definitely a red flag shes a player for sure. She doesn't want people to know about you two and is fishing.
Although hard ditch her quick and dont waste any more of your time with her.
I managed to get the engagement ring back and I was called all sorts.
The funny thing now is I found out / seen she is not even posting pics of her existing bf on Facebook 馃ぃ