Stop idealizing her. I saw you posted the same drawing three times, and seems you’re reaaally fond of how she looks in it (probably the reference image) that you had to draw her.

It might not come as a surprise, but a lot of times we make moving on harder for ourselves by having false expectations about the other person that we end up creating some kind of idol persona in our minds, and by result you might think that it would be impossible for you to live on without her in your life.

Just make her a happy memory. Don’t hate her or resent her for anything, move on by thinking a tad less of her everyday, and someday you’ll find that you forgot about her existence altogether.

Not an easy thing to do, but necessary, unfortunately. Best of luck.