Sorry for your loss.
There are so many posts in this thread I want to 'like' but it feels wrong 'liking' someones heartbreak, if you get what i mean.
I lost my mum to cancer 3 years ago, and i am not in the slightest bit ashamed to say I can still get a tear in my eye when something minor reminds me of her.
After her death, I realised that a lot of people volunteered in her hospice, and i did nothing myself to help others. So I decided to donate blood and have donated 13 times now. Every time I donate i think of her, and know directly because of her death I am now helping save lives.
It may not be possible in your case, but it helped me to get over her death and might give you something to think about.
Don't bottle your emotions up, and don't be afraid to ask for help.
Best wishes