I don't get people reasoning that 'oh, she's had failed relationships in the past so this one is also DOOOOMED'. I bet a ton of the people here have had as many (or more) break ups as Ayu despite being years younger. Doesn't mean that will always be the case.
Also, knowing someone for many years isn't a guarantee of a successful marriage.
Anyway, I wish Ayu all the happiness she can take! I hope for a long and prosperous relationship