So maybe just think of you have been intense and demanding in a way that she may have found a bit too much
I think this is probably true, but then it's also worth considering that sometimes, people find it 'too much' if you're 5 minutes late to meet them, or if you ate the last biscuit.
What she finds to be 'too much' isn't a comment on you, it's a comment on her, and where her boundaries are with regard to how much support she's willing to give. You felt that one level of support would be appropriate, and she felt that another level of support was appropriate. That doesn't mean that you did anything wrong; she is not the final judge on whether you are 'acceptable' or not. There are no rules about how much support we are 'supposed' to want/receive, so you can't get it wrong. The two of you didn't match, that's all. And then she decided to ghost you, which she must have felt was justified, and you didn't, so, again, it's a mismatch.
I think most people would be unhappy if a friend decided to solve a problem within the friendship by walking away without a word, so I can't understand why people are rationalising what she's done; they may be able to understand why she was upset, but walking away is generally an unhealthy relationship trait (unless there's abuse)
Unless you've got people walking out of your life on a regular basis, you can't really use this as something to judge yourself by. It's like deeming yourself to be crap at walking, just because one person pushed you, and you fell over.
Have a look at this, which includes this sentence
If the loved one rejects them or fails to respond to their needs, they might blame themselves or label themselves as not being worthy of love
https://www.attachmentproject.com/blog/anxious-attachment/