Whether the relationship between an older woman and younger man is a sin?

I read in many places that age is just a number however in my personal life I am confused . At a time when I suddenly started to enjoy my life thought of forbidden love haunts me .
I have a similar post here and this is what most people feel ... I'm a bit heart broken :(

https://similarworlds.com/story?fid=3&tid=465615&name=Dating-Relationships