>>82394047
>she'd always tell me she loves me and wants to marry me one day, or make art for me, but over time those things slowly stopped and although she continues to talk to me every day she talks to me less and less and those other things stopped happening
She gave up. She thought you might change your mind about wanting a relationship and set about showing you what she had to offer. And it felt so good to be the one to be on the receiving end of all that effort and energy that you took it for granted. You weren't appreciative and she noticed it. You didn't respect her and she noticed. She noticed you weren't putting the time or energy into your relationship so she stepped back to see what happened. And you forgot her birthday. You led her on. You didn't deal with your issues even though she wanted to marry you. And now she's leaving you "just like all the others" because YOU fucked up and didn't communicate what was going on in your head and didn't respect her or her feelings enough to act on them or let her go.
How many years of her life did she waste on you because you couldn't get your shit together?
Now, she's probably of beta/simp make so you can probably salvage this. Start with an honest conversation: you noticed that she's stepping back from your conversations. Ask her what's happening (don't assume it's about you) and admit that it helped you realize what losing her would do to you. Then you arrange to fly/drive out and meet her at your earliest opportunity. Be romantic; a cozy date, flowers, chocolate... and then lay all your cards on the table. What's going on in your head, your tendency to self sabotage and that you might need her help to get your head out of your ass, your feelings. And then you offer to make a real shot at a relationship and hope to spend the rest of your life making it up to her.
If you aren't willing to do that then let her go.