@Aether If she was 2 decades younger, she would be able to pick the kind of guy she would want to date. So her being 43 is a critical part of her issue, as she now cannot find the type of boyfriend she wants.
This is why women need to be told to not waste their 20s on anything that is not conducive to getting the relationship they want for the rest of their lives. Because even if she lowers her standards, she will be resentful and unhappy.