<human>: So, my very first girlfriend and I broke up about 4 years ago after being together for about 2 years. I dealt with the situation poorly back then, and it pretty much destroyed my self confidence and social ability.  
I was almost back to my original self until a year ago that 'things' happened and I ended up in an FWB arrangement with the same girl. I had convinced myself to stick to FWB but that didn't happen and I ended up falling for her again.  
**Now** the sticky situation is that she didn't feel anything like that about me and we decided to stop the screwing around too. We were also kind of close friends before the "benefits" and used to talk a lot. But now after stopping the FWB, we hardly talk and it doesn't even feel like friends without benefits anymore.  
I seem to be dealing with it like there's a void in my life. So clearly its like I'm treating it like a real "breakup" from a real relationship. I don't want to feel that way because its debilitating but I don't know how to stop. Help, Reddit?

Condense the text into a few key points
<bot>: Fucked around with ex-girlfriend, fell for her, had to stop because she didn't feel that way about me. Feels debilitating but I don't know how to stop. Need help