For me, when someone leaves, I totally collapse, but I'm also 100 percent private. I view it as hopeless and inevitable that they left and would never reach out to them because I assume they hate me/are better than me/have met someone else. 

During relationships I'm extremely attuned to every detail - are they interested? Did that thing I said bore them? - and try and construct an entire image and routine based around them in order to feel like I have some kind of control over the situation. I also become very superstitious and very methodical, as in, they took two hours to reply, so I'll take three, or whatever else.

I don't ever yell at them though or show my emotion. Like, that would obviously be counterproductive so I just keep it to myself.

What about you? What do you do and has it worked?