I have been through it . my ex wife left , and we had 3 children together . at the time my oldest daughter was heavily pregnant with our first grandchild.
I had my 2 youngest children most of the time , and even though I was dying inside , I had to carry on and be strong.
my advice is this
1..... keep busy, and set small goals. take each day as it comes … YOU WILL look back and realise you are healing, all beit gradually.
2..... learn to be on your own, as hard as it is , this will benefit you when you do meet someone else . you will become a better , stronger person.
6 years on for me … met my partner 2 and a half years ago... getting married next year.
I can not express how far I have come, what iv learnt about life and myself... and also how content and happy I am
good luck with the healing , and remember …. LITTLE STEPS