They have been dating since 2009 but her father insists that its either the guy changes to cherubim and seraphim or he does not marry his daughter. They love eachother and are confused, what should they do please?

Convert? I thought that word was for inter-religious migration. The father-in-law is being unnecessarily difficult. Or he doesn't just want his daughter to leave C&S,for 'special' reasons. The girl needs to ask her father questions or to 'cry' him into reason.

my take on this: if the man is bent on a change from RCCG to C&S, he should go ahead and marry his daughter, abi nor b the same God dem dey serve for both churches? Mschewww....when d poor girl enter menopause, na den e go dey find babalawo wey go gree marry d dota

Very ridiculous request. And when I say christianity is awfully divided they don't believe.

This OP is probably a learner. Don't you know you will get more advice at the Romance section than here?
Pls mods, kindly help her to move it there.
@ Topic, your father is making a very ridiculous demand! He is in no position to dictate such an inconsiderate order to your fiance!

Na long story be this, For this generation? and your father is still making such demands... Nawa. ndi uweyi ocha

If she no ready to leave cherubu, unto the next one jare