Do not let those older frum girls go! We have to make them feel wanted and appreciated, not swept aside and undervalued.
And as for the girls themselves, try and think outside the box, sorry to sound patronising but if someone makes a suggestion or gives you an invite, go for it, honestly you have nothing to lose. If you are a great girl nothing can take your dignity and self esteem, but do not shrug off those not ticking all your boxes, sometimes they can be most interesting of all. As for age differences, an older man who has been divorced or widowed can offer better appreciation for a young woman than a fussy young boy, think about it .