I reckon there's enough failed relationships out there to not stand on the moral high ground on what a good one should look like . A successful relationship is one where both partners are happy . Not where one partner is 3 years younger and 3 inches shorter than the other . Where one is the appropriate weight compared to the other , the list goes on and on . These are all peripheral things that while society says they don't judge ...they do . I'm not advocating the Op's position ( I have no idea what that even means ?..Op? ) And I think it's about as unlikely a scenario as one could be , and I also believe the Op is misjudging the situation and for it to most likely to end in tears . But I'm not ever going to say what a good relationship looks like ..and that's from someone who met their wife 29 years ago and we are still together . So much to the point that we rate no other humans in the world apart from each other , as experience has shown us that each other are the only ones we can truely ...truely rely on in every situation . But I've observed enough relationships not last to not say what a good one is based on .