How have you handled a break up in the past?

Woke up today feeling really excited for a date tonight with my LDR S/O, but I had my doubts they weren't happy for a long time and I tried to make them feel special and then twenty minutes later after waking up it's all over. I had suspicions this was coming and with my anxiety I was expecting it to happen tonight. I thought I would be okay but I'm really not, how have you coped in the past with an LDR break up? Also do I have to leave the subreddit now I'm single?