I Am 62 Years Old, 5'2, 105 Pounds And Never

I am 62 years old, 5'2, 105 pounds and never had kids! My boyfriend is 6'2, 190 pounds and have a very tall and large penis (8") and I am going to lose him because we aren't able to have intercourse...In the past, I took hormones but my doctor said it is not good for me anymore! I have been trying everything from dilators to almost anything...
What is my problem?
jac