I would say you put up with her for this long, she probably won't say no. Doe's she have any bad habits ?? LOL allot of those habits are hiding till ring goes on her finger then it's hello Mrs Satanica LOL, it's their little secret handshake thing the girls have
. Keep in mind all the good stuff she does will go away once you say I do, it is called the Oprah syndrome LOL.
Good luck to you man, I am sure she is worth having for many years to come. Just remember........ be strong you'll need it to train her right.