About 10+ years ago, had sort of 'love relationship' (long distance relationship/LDR), she wrote and broke up with me because of incompatibility. 
Then, she ghosted me forever, I tried to search her through social media but to no avail.

Time heal me, I moved on. Once a while I tried to search, again same thing, nothing.
I decided to continue on our separate paths in life.

Life isn’t always easy/ups & downs, but I’m thankful finally have real love in my life, my marriage and my child make everything worthwhile and (those previous relationships suffering I have no love feeling for them anymore).

I search her again, the name and location looks very familiar, and then tried to connect to her.
"Hi" to her. She replied, "Hello, it's been a while...".

I’m hoping she replies, but if that’s the only message I receive, I’m content.
Along with wife's permission, I want to be friend with her again (not love relationship).