What should you do if a person is detaching

It’s been a long story, and I can’t be bothered to repeat it all again, long story sort I asked some questions, and she said that I was still important to her, but that she has detached from me and is significantly, she said she was isolating herself, not just from me be it from anyone, then I asked so what your saying it, that there is no point in me loving or, or I’ll never get that back, and she said “not like that, it just won’t be the same” then she went to bed.