I wonder how many relationships this man has been through and the reasons why they broke down? He may have a history of control. How is he around his daughter?
I too would be angry if decisions were made without discussions unless it might B an emergency. We have a his/hers calendar , if it aint' on the calendar we ain't doing it

We likes a meander we does because our situations impact on our health and vice versa. You rant Girl! No wonder you are teary, what support do you have otherwise? It may B that this relationship is on its way out due to his reaction around your health needs - as well as turning his decision back to you.
Men in particular become angry when afraid. It took me years to understand why my dad was angry, even more recently that my Mum caused a lot of problems that he was blamed for.

. [long story short]. MayB at this time of your menopause journey think about your finances i.e. do you have access to your own money if push comes to shove. U do not have to put up with his behaviour. Love does not solve all issues! My respect would disappear quickly if faced with a similar situation.
His words 2 U are those of someone trying to control and coerce another. Treading on egg shells is not the way a relationship should be. Also - 'going to kill himself' is a well known statement as is 'we won't tell Mummy about my being in your bed' to a child. Typical statements meant to scare and control.
My Mum would shout "I'm going to run away" so Dad would open the kitchen door - "Off U go then". She would huff loudly and go to bed. When she tried to control me I would do the same as Dad ........ when she tried the trick in the Care Home they took away the keys to her French doors! She never did realise why

. Be careful what she wished for!
Make a list in your head if necessary as to the good/bad parts of the last 3 years. Is there a history of repetition in his statements for example or is this a more recent problem? Where would U like 2 B in 6 months time.
Some men don't deal well when their partners are ill, Dad was the same. He became defensive etc..