Hello Mizzy,
I am sorry to hear about your loss. Sending you a welcome hug.
I am sure it must be very difficult for you to be working at a place that has a link to your partner. I found it hard enough having to go back to work at a place that didn't. I think going back to work is one of the hardest things you have to face after a bereavement. You are not the same person you were before this happened and it changes you and changes how you feel about your work and your life in every respect, so I am sure this is a complication that must be making it even harder for you.
I am glad your daughter is being so supportive and am pleased you have the new puppy to distract you both a little. Pets really do help. it's a pity about the plants though. I hope you were able to repair the damage.
I think we all go through similar experiences when we are grieving. I certainly recognise all that you describe in your post, as I experienced them too. I am almost two years into this journey now and it has got better. Nothing ever really fills the void left by the person you have lost, but you can move forward slowly. You have to. You find your way slowly, and you have to find out what sort of things help and use those little strategies to help yourself. I found having flowers around helped me and walking in the park is still helpful. I find it a calming place to sit to think about all that has happened and try to take it all in.
It takes time, Mizzy, but slowly you learn to live with it and build a new life for yourself in this new 'normal' that you did not want. Tears and loneliness and devastation are constant companions, so you have to find ways to combat them and make things better for yourself. I joined a class in a subject myself and my mother both enjoyed and found that helped. It gave me something to look forward to each week and got me out of the house. I made some very kind understanding friends there too and that helped as well. Perhaps once you are a little further into this journey, you might try something like that too.
I hope you find some comfort and good advice here. Thinking of you...