My suggestion is go and get married to her if she needs your companionship, age doesn't matter. I don't see any problem between 19 and 27 yrs, but the perfect age of getting married. in my opinion, guys must be older than girls, there are many reasons: first, good relationship because mature guys can handle their wives very well; second, guys about 8or9 yrs older than girls can have strong socioeconomic condition and have developed the ethnocentrism as well; third, after having pregnancy girls look like women, so the couples seem as perfect match. Guys shouldn't shy-away to go with their wives because wives won't look like much ugly or old-faced. Once girls become over 30, their appearance could match with over 45 yrs old guys.