I have a problem of trying to fix people. I need to know how to stop.

My bf likes space and I want to get in his head and know why he is upset and fix it for him. I have a history of being a " fix it felix." I am going to school to be a therapist. I believe this issue is because of how I grew up. My mom was mentally unstable as was her relationships. My father can get angry so I learned to hide anything that would upset him to keep the peace. I had to take care of younger kids. I also lost my first bf to kms that same day my mom left me. My second bf threatened to kms whenever things didn't go his way. I feel I need to take care of everyone and like I am responsible for them. How do I fix this.