Do I or don’t I?

I will keep it brief! I had a childhood friend , who after 40 plus years of friendship cut me out for no particular reason.
They moved away and this was 15 years or so ago.
I recently discovered that she has moved back , not too far from me. I also discovered that she had lost her partner .
I am torn as to whether to make contact or leave well alone
It’s sad that the friendship ended but equally I don’t want to make a mistake by getting in touch. Would appreciate any comments thanks