I think just recognising and admitting it is half the battle. Good on you for getting that far!

It is only ever possible to change if you want to and you do, so i definitely think you can change to a glass half full person! Do you do things for yourself that make you happy? I find if i am excercising and doing something i love it is much easier for me to be the positive and happy person i like to be.

Time just for me, helps me to be a happier mum for my family, it's not always possible, but definitely helps!