I'm sorry you are feeling this way @Tempnamelady.
Have you thought about therapy- counselling, CBT or mindfulness?
This reads as if you are grieving for the loss of the 'other man' and extrapolating this into a menopause issue when it's really a relationship issue you have not come to terms with.
It all ended not through choice for either of us and I cant seem to get over it
But one of you must have made a choice to end it.
As PPs have said, your thoughts aren't logical. You seem to be saying that because your marriage is over, and you have spilt up with the 'other man', you feel old and are upset that you now need HRT.
Using HRT is not a sign of old age (any more than using any medication is a sign of old age or failure of some sort.)
You have so much in your life to be thankful for- a good career and lots of friends.
Can you get to the point where you don't feel that having a man in your life is the only point of living? You need to learn to be happy alone, not bouncing around between a nasty husband into an affair then back again. You're worth more than either of those.
I know it's a cliche but it's only when you are happy on your own that you are ready for a new relationship. There is no panic- you are just 51!
This is something perhaps to talk through with someone who can help you unravel your thoughts.