Sorry but what sort of 23 year old would want to marry a women 10 years older than him with 2 kids, Thats not what 23 year olds do, they should be out having fun.
I don't know, a 23 year old who's more mature than most 23 year olds perhaps? (Maybe some people have different ideas about fun?) Why should they? Is there a code of conduct for what people should, or shouldn't do when they're 23?
Well than enjoy what you have now and don't let worrying what will happen 10 years from now spoil your relationship.