Scientifically speaking, what is the best way to get back with an ex-girlfriend? What is some good research on this subject? All I find online is dudebro science or chick crack. I want some solid papers with good methodology and large samples.

(Got dumped on August 29. Been in no contact since September 5. Am I getting high on dreams? She blocked me again 2 weeks ago. Longest period of being blocked. I don't even know why I got blocked: I did not contact her at all.)