hi bunny welcome
ive been in that situation i told my ex about it, she took it really well considering she wasnt a open minded person. but did say she never wanted to have anything todo with it although she didnt mind me wearing them in front of her under cloths if i didnt wet or mess. thing went on like normal for ages till we split up for other reasons and im not sure if these where her true feelings or because it was heat of the moment emotions etc but she said some very nasty things to me.
my advice would be to take it very slowly with her if you decide to carry on with being a abdl make sure she is really ok with it, my ex although she said she was she was hiding her true feelings.
on a happier note ive also told my mother and she was totally cool about it she talked about stopping and i told her i dont want too im happy with who i am she said fine your not hurting yourself or others, your happy and thats what matters to me.
i hope everything works out for you