The past is the past! or is it?

What does it mean to trust someone? Is it that u don't trust them or that u have trust issues due to ur past? I have had trust issues all my life but it didn't start w/ my relationship it started when i was just a little girl. I didn't always know that until recently;  i had to dig deep and find that it wasn't about "trust" because i do trust him. I finally saw that it was due to my past.  One early morning he came home from the gym  and i he noticed something was wrong.  He asks me whats wrong so, i opened up to him and told him that sometimes i think he isn't at the gym and instead with an other women. He looked at me with disappointment "again" and  calmly told me that i don't trust him and i tried to explain to him that it has nothing to do with him because i do trust him but i have issues because of my past and even though i trust him i battle with myself, and with my past. I walked away to start breakfast and  then it hit me, i began to remember things from my past that i always know about but some how berried...
 All my life i remember my mother would always make comments about my father when he would go to the gym, she would say that he is with an other women. My father also had is own carpet cleaning business and she would say that he was "cleaning some women's carpet";  if u know what i mean? There were a lot of times when she would take me to the gym to check if my dads car was there and even if it was she would think that he parked it there and then left in the "other women's" car. My dad had a second job and  worked nights and she would wake me up in the middle of the night and make me get off the car to spy on him and check if i could hear him or see him while he was loading the trucks, she would then drive all around the parking lot to look for his car and if it was there she would still think he parked it there and left with the other women. She would check his pockets when he came home and sometimes look through his trash of shredded paperwork and try to put the peaces together. Sadly, this went on for years and years.
After all these memories came back i went to share it with Dom he felt so bad and sorry for me, and  began to understand where it was coming from. I began to cry because it hurt me so much at that moment to realize that my mother had to live this way for soo many years, and now I'm living the same way and i don't want a life like that. I feel that my mother and father embedded fear in me. I knew for so long that it wasn't "trust" because i know just aswell as everyone els does that i have a wonderful, trust worthy man of God. People might assume it was all in my mothers head or that she was sick, but that's not the case at all. My father did things that he shouldn't have like lusting at women in front of my mother and his children, he cheated, beat her, suppressed her and made her feel so insecure about herself. There is so much more but i wont get into it because my father is a changed man  today and i don't want to make it sound like I'm bashing him. I love him with all my heart even though i am still affected today by the things he did to my mother and I.  I just want to tell my stories and be as open and honest as i possibly can to not only heal and help others but for my self aswell. For the people on the receiving end; you only see the surface and take things personal when it might not even have anything to do with you. You should try to explore where these behaviors or feelings are coming from. That's if u care enough, because i know there are people who just don't... If that's you then Dig deep to figure out where the issues are coming from.I dug deep and found something i hadn't remembered. It helped explain soo much. Aside from the bad things that happened to me my men alone, this was just another reason for my insecurities towards Dom..... If you keep triming the surface then your not getting to the core of the problem. You have to get to the root of it. You cant just cut down the tree you have to pull out the roots and plant a new one.