I don't believe there is any "right" way to go through what you are going through, only the way you need to, to get through it yourself.
IMO it really IS whatever gets you through the night ... is alright.
Sharing here with us, as you have always done is part of that, as are the sessions of counseling.
Being there to support your own family and in turn BE supported, sometimes something we don't do that well, will all be part of the new Journey.
All you, we, anyone can do..... is be their own best person, and sometimes that means letting ourselves benefit from a little compassion for ourselves, such as we would extend others.
Your sadness is real, losing Angie.
Your guilt is understandable and "normal" but is it really "real" ?
I have been where you are, as patient and caregiver, and found that I came to understand I was not really guilty of surviving where others passed. I was simple fortunate, and try to live life as a testament to still being here to honor those who I have lost, many on this very forum.
I think you have always tried to honor others and support them, as I said in the In Memoriam
topic. So when the "feelings" of guilt are assuaged, my sincere hope for you is that you too may resonate with a more harmonious and supportive inner peacefulness.
It may not be easy, BUTT my wishes for you, are that you can find a better place in your own life and your family's.
Still with the Love and Joy of being Angie's soulmate .... but without the guilt and pain.
In time my friend, as others have said .... in time.
Love Peace and Harmony
On the Journey with you