Avoidant personality disorder

Hi everyone,
I have recently found out that my mum has avoidant personality disorder. I always knew something wasn't quite right but couldn't figure out why. I have always been the one my mum vents to about anything and everything which is exhausting and I have constantly told her I can't be that person for her but she never listens. She is overly sensitive, moody, and I am always tiptoeing around what say. I get calls and texts daily, even when I am working, about how hard her life is. From what I have read I have been 'parentified' my entire life, which is where I have been basically the parent figure to my mother. I often hold back my emotions until I explode because of this. This causes issues with my husband and I want to make sure I am being the best possible mother to my kids too. I'm not sure where to go from here, but was wondering if anyone else has experienced the same thing? I am feeling quite alone in this at the moment and thinking about possibly seeing a psychologist to get some perspective.