Oh Abigail Sounds like you really need some of these

Fortunately it isn't an issue for us - my niece (my sister's DD) is 8mths older than my DD and has only recently gotten out of night nappies, so my sister sympathises and keeps telling us DD will get it when she's ready. My other good support system is my local ABA group and there is another 4.5yo who is still in night nappies and her mum says the same thing, they will get it eventually.

I have another good friend who's favourite saying is "They won't still be xyz when they are 18", replace xyz with breastfeeding/night waking/using nappies overnight.

I'm really sorry you are feeling unsupported in this. My DD is the same - she wants to get it, she really does. She has a big LaLaOopsie doll (some mermaid thing) that she chose from the Toy shop as her reward for five dry nights. It is sitting up in her room, where she can see it. She had three dry nights in a row and I got really excited that she was getting it... then more wetting overnight. Now we've had two nights, let's see what tonight brings.