What do you think of friends / family members you can’t tell anything because they are like the town crier and will gossip your buisiness to anyone?

I learned to keep everything to myself growing up because of this. It's a horrible way for a kid to be raised. I still won't tell my mom anything she doesn't need to know. I won't answer my phone in her presence. I have never discussed relationships, dating, etc. I never had a shoulder to cry on or support when everything felt wrong. All because I know she'll tell anyone and everyone and exaggerate it all.