Hi guys I've read this whole thread and just want to send you all love, you're amazing what you're all going through.
My situation is different to yours but I hope I can join the thread anyway. I wasn't actually in a relationship with the guy I am NC with.
Basically he is a crush I've had for about 7/8 months, we see each other regularly and he really has led me on. I guess I was in a vulnerable place when we met, single mum coming out of a long relationship and I feel like he really took advantage of that.
We get on so well and he made me feel so special to hook me in, but in reality he doesn't care about me. He sends me messages daily (on Snapchat) so last night after months of regular chatting on there, I blocked him - which is HUGE for me. 24 hours on and I'm still upset about it when I don't even think he's realised I'm not on there anymore, or if he has he doesn't care.
I will have to see him every now and then but I think removing him from social media is a massive step for me - I now can't see his updates and check up on him like a psycho. Just need to stop checking his whatsapp online status now as I last messaged him yesterday and he just ignored it
so I need to realise he just doesn't care and was using me for an ego boost. 
I guess it helps the fact that he isn't messaging me as it just shows he didn't care, but that hurts so much too. I'm going to miss that high I get from seeing his name pop up with a message. I sound so pathetic I know.
My advice to those of you saying about social media and how their posts make you angry is to just remove them. It's SO hard to do, but in the long run it will just make the process of moving on a lot easier and quicker (I hope!)