Manual trucks

So when I was about 4-5 years old my grandpa on my dads side sexually abused me. I was to young to remember what he did entirely but I do remember it happening and I thought it was a dream for the past 10ish years, but then I found out about 4 years ago that he raped my 7 year old cousin. That was when I realized that it wasn’t a dream. I started remembering certain things that happened in my childhood that lead me to believe that this had happened more than once with me and another cousin. I opened up to my boyfriend about what happened when I would sleep at my grandparents and he’s very understanding and helps me when I have panic attacks (I have extremely high anxiety and possibly depression) I love him very much and he loves me. One thing that I remembered was that my grandpa always drove a manual ford truck and whenever he would drive me places he would make me sit right next to him and he would touch my leg and I can’t remember for sure if anything else would happen but my boyfriend drives a manual ford truck not the same truck but whenever I ride in it with him and he drives I can’t help but think about what my grandpa would do to me and I hate thinking of that situation when I’m with my boyfriend because he would never do anything that my grandpa did but it just always comes to mind. My boyfriend doesn’t know this and I don’t want him to know because I don’t want him to worry and feel like he needs to try and fix it cause that’s the kinda person he is. And I just really needed to vent that. I didn’t think this was going to be this long but I just was wondering if you guys think I should tell my boyfriend or not.