Hello there,
First and foremost, I really appreciate you sharing your situation with us here. I understand it must not have been easy and I admire your courage and your faith in us :)
Coming to your concern, I am able to understand your difficulty in coping with the situation in front of you. Relationships and break-ups can be daunting to deal with and situations like yours can make it even more challenging for it requires not only the courage to 'accept' the reality how it is but also the strength to cope with the situation at hand.
At the same time, I believe in your ability to face the situation with strength. However, I understand it is easier said than done and for you being the person going through the situation it may not be at times easy to fight back your fears.
In a situation like this, 'therapy' can be a helpful solution. It will help you to understand and recollect your inner strength and overcome the fears that may be holding you back. Therapy helps one to get a better reflection of the situation and their ways of dealing with it, bringing about more 'clarity' not only about the reality of the situation but of the strengths and abilities within them to not only cope but 'win over' anything that may be holding them back.
Thus, therapy can prove to be beneficial not only to cope and overcome your current issue but will also help in making you mentally stronger to face similar fears with more strength and least mental damage in the future.:)
If you have any doubts or questions regarding therapy, please feel free to explore them through the platform. We would be happy to help :)

Hope it was helpful :)
Take care
Be well :)