Originally Posted by CattivaGattina
I know that she needs validation (Primal has even stated that she's high maintainance and needy) and I don't know how to make it feel like she gets all the validation she needs during the brief times we can be with her.
At some point you can't be responsible for someone else's insecurities. It's been my experience that the more you try to do things for needy people, the more needy they become. It's not your job to make sure she "gets all the validation she needs". That sort of thing has to come from within her.
How about writing to her on paper, reassuring her, then leave it up to her whether she wants to believe you or not. She can carry the paper around with her and read it for comfort. That's what people used to do back in the days before cell phones and internet. Aside from that, there's only so much you can do. She ultimately has to be a big girl and confront her own demons. There is no reason why you should be sucked into her vortex of insecurity. No good will come of that.