Well basically, when a girl leaves you, why do you feel like you didn't do enough for her?
Like you either over did the love showing or that you didn't go on enough dates or that you didn't treat her well. Despite her saying you show your love a lot to me, and that we don't need to go on fancy dates just keep it basic. But then the very next week leaves you because she was not happy in the relationship.
Most Helpful Guy
we unconciously choose the explanation that caters to our needs better
in your case control: if you think its your fault that gives you some sort of handle, that if only you didn't f*** up that one thing there everything would be perfect.
the alternative is a lot less appealing: if she left you "for a better man" for ex. it would mean utter defeat and a lot more loss of self-value thus we cross that out.
note that I'm not saying either of those is the one that happened in your situation, this is an explanation why we all lean towards one explanation rather than another one0