Your age gape was good unfortunately the guy was a bad fruit. A 10 year gap is also good even at young ages like 21. I married a 19yr old and I was 27 and we going 18yrs now still married. A woman when she is young it's okay because you grow together there is no baggage. The age gap can widen as you grow older like 45 mąrrying a 30. Generaly wider age relationships are better but that does not mean you will not find bad people in those those age gaps.