It must be exhausting for you Legs, we all hit that wall where you think you're just going to run out of energy, I remember never being able to relax.
Trying to sort everything out, keeping my mind busy and put things in order, I don't know if you're like that but add into the mix the constant thoughts of loss and the changes in your life, it means you're running on empty.
Having a new relationship will also burn that energy up.
You must try to relax or you'll become ill, when my lovely husband decided to find a friend I had just been diagnosed with a critical illness, I think that's where I went wrong, him not getting the attention he needed, anyway thats another story but after our split I just couldn't do it.
I wasn't well enough to get going again in a possitive direction, I had to choose how to use my energy carfully.
You have to look after youself, pace yourself and not expect miracles, I understand you not wanting to talk but it could help if you've never tried it. Try a session, it can be a place to park your negative emotions at a specific time each week.
Anyway it's up to you, but you've got a lot going on and there really is no shame in asking or getting help for your mental health.
You sound tired, let someone listen to you and the trauma you have endured, yes you have been so strong but opening up especially to someone you don't know can be an enourmous relief, there are some really good councellors out there, you sound like a dam about to burst Legs.
Maybe it's time to offload.
Take care.
xx