Had a Casual Relationship for a few months and now I have feelings for her

Hi everyone it’s my first post here. [24M]met a girl[24F] on a dating app and went out with her few months ago. We were having so much great time because of that we met regularly. But we were so clear about the things we want we both cleared that we don’t want any relationship since she went to a very bad breakup a few months ago and she is not fully moved on from that. But we were sharing a very good bond that we forgot our limit and we started to act like couples and started to live together for sometime. Before me she was on a dating sprint then she stopped meeting new people because she doesn’t want any one that time other than me. But suddenly I had to move from there to another city because my job demands it. Till the date I left we were living together. Now am having strong feelings for her but her feelings are kind of faded that she made clear that she is scared it will hurt her more and she is planning to start to restart her dating game.But my mind is still stuck with her and can’t move on to next phase with thought that was just casual. The thought of her going out with other guy make me lose sleep at night. I don’t know what I should do now I literally hate this feeling of getting attached to someone who is trying to move away from me. Any advice will be appreciated Thanks in advance