The end of my marriage coincided with the death of my father from cancer.
That was a REALLY sucky year.
I could have used those very heavy events as excuses to flame-out, but I chose to reach out for help, I chose to get into therapy, and I chose to make some changes in my life.
It was a natural time for some very deep self-examination.
Your BF has the freedom to choose how he wants to handle adversity and you feeling guilty over his choices is actually creating a lot of dangerous misplaced energy/anger that you end up directing into your own body.
Do what's right for you and let go of the outcome.
Peace-
B