Is it normal if i'm scared of moving on?

I'm scared of moving on from my last relationship because I just simply don't want to move on from what I had. I want it back and I know it just happened, so I'm not freaking out too much but it does feel like forever already. Anyways, I don't want to move on and then be okay without him in my life, I know its weird but I just don't because I want him to be in my life. I liked what we had, and what I pictured we would have in the future. Im afraid that once I move on, Im going to forget and miss out on all the good things about him and our relationship and I don't want that. I know I am capable of so many more great things in life but like I said, I want him to be a part of it.

We split up because we just arent in the right place to be in a serious relationship. Our situations are not established yet so it just got in the way. We both said that if its meant to be, once we're more established, well reunite and get a chance to have a real relationship. So it makes me happy that he sees that as an option like I do. But I just carry this fear of moving on so much further in life than I expected that I forget all about him. Especially if I find someone else and settle with them, I know in my heart that if I bump into my ex while being w someone else, itll be trouble because Im going to get all those feelings again and possibly leave my bf/husband for him.

It's actually kind of like The Notebook, if you watched it, it's like when Ally looks happy and is established with her career and her fiance until she sees Noah and then bam, nothing was great after all cause she didn't have him. That's exactly what I fear. But I also know that me moving on and growing as a person would make him more attracted to me so in a way yes I'll move on but I'll be cautious and always have him and our life together in my head to remind me not to move on too far.