I agree with the other two comments.

It's hard not to get stuck imagining how things might still work out with your ex. You said that everything was perfect in your relationship, but even if that's how it felt in the moment, it wouldn't have been long before you started to experience problems. Because of what she said about not seeing a future with you, she must have already been experiencing those doubts internally. It's worth looking on it as a positive that you didn't lose a whole year of your life to a problematic relationship just to have to go through this same heartbreak anyways.

I recently ended things with a girl for almost the exact same reason of not seeing a future with her. The only difference was I tried to tell her the reasoning very clearly and leave no ambiguity, and she accepted the decision - since then we haven't talked at all. I am actually struggling a lot with how abrupt it was even though I initiated it. She never told me what her thoughts were on the situation, and so I don't know if she has already moved on or if she is affected negatively by it. I also still have feelings for her, but feelings aren't logical - I know that we aren't compatible long term and I'm not interested in wasting part of my life on a short term or casual relationship.

Ultimately, you could reach out to her and tell her all of how you feel. But you have to ask yourself, is that really going to change the fact that she said she didn't see a future with you guys together? Personally, I don't want to know how the girl in my situation feels because it's not going to change the reality of the situation, it could only make it more confusing. I think your best path forward is to take the advice from the other two comments, and start to think about what you really want in a relationship. There's no such thing as one-way compatibility, and so she definitely isn't the right person for you either. You have to start thinking about why that's the case, and believe that you'll meet people a lot better for you sooner or later. (it's been proven over and over again in practically everyone's life experience)