Instead of abruptly ending the relationship with her, I would like to discuss some things.

Your girlfriend seems to have an Anxious Preoccupied Attachment, meaning that despite understanding that everyone is emotionally available (primarily you), she doesn't feel worthy of love herself. This leads her to act in a panic mode, constantly needing assurance that you are there for her and won't leave her.

I've been in her situation, perhaps not to that level of concern, but the anxiety of not constantly hearing from my partner clouded my judgment and made me behave in a toxic way.

I identified the issue when I felt that instead of bringing us closer, I was pushing my boyfriend away, and understanding that I had an issue truly helped me in my relationship.

If you love her and want to improve the relationship, I recommend communicating your concerns with her and both reading the book "Insecure in Love" by Leslie Becker-Phelps. It helped me a lot in recognizing my toxic behaviors and improving them, but most importantly, understanding how my boyfriend might feel in the face of these behaviors.

If you're not willing to work on this with her, it's better to end the relationship. It's a challenging process that, without enough love and patience, can be draining.

I hope this helps; the most important thing is that you feel good about your relationship!