Thank you all for your responses
I remember being where you guys are right now. It's the worst feeling in the world. My advice would be to be around supportive people, to journal your feelings, to make baby steps of progress and not push yourself. Be really kind and gentle to yourself, loads of self care and just go with the flow and don't beat yourself up for not getting out of pj's for 4 days or not loading the dishwasher or for not eating a decent meal. I found it helped to talk to people going through the same thing or had been through it before and found happiness after.... So keep posting and supporting each other
If you feel like contacting him, write it in your phone notes. Write him letters if it helps just don't send them. I found it helped me process my thoughts.
I got so angry with myself because my mind was constantly giving me a highlight reel of all our best memories and it kills you but you can't stop it. Remember it's just your brain having lost its source of dopamine... Just like if you go on a diet all you can think of is food. Try to do something that takes your mind off it, watch something/read something/take up an old hobby. It stops being constant after about 4/5 weeks....
Also that's when I went back to work. I was due back after 4 wks but on the day I was due back had to get another weeks note as I just wasn't ready. The next week I felt better though and got there. I told people I didn't want to talk about it and they were extra kind to me but I knew if anyone mentioned it I'd cry and I wanted to try and be strong at that point. Going back to work really helped me gain some normality and purpose again. As much as having time off initially was essential(!!!).. Id definitely recommend going back as soon as you feel ready, it helped a lot.
Just a little end thing so it doesn't surprise you if it happens. I lost 2 stone over 6 weeks because I barely ate, I didn't take my vitamins, didn't sleep. Just when I was starting to feel a bit better exactly 12 weeks on, I started loosing clumps of my hair. I rang my doctor and she said my body was so traumatised by what happened that it had shocked my hair into not going into its next cycle. It came out in clumps when I washed / brushed for 3 month and then just as fast as it started it stopped when my hair went into its next cycle.
A good book is its called a break up because its broken. It took me a while to be able to read it though as I didn't want to accept what was happening.
I'm just going to keep being strong and try to move forward. Really appreciate your replies, they made me cry a bit. It definitely helped to get it written down so thank you for reading