How do u ask your mum for a Facebook so you can catch up with all of your old pals and also your boyfriend when he finally askes you out?

Well...firstly don't call him your boyfriend as clearly he isn't and that's just weird and almost going to hit stalker status.

Did you ask your mum to join Fanpop? if yes, just ask her the same way. If no then do what you did to join Fanpop.