Is it okay to call this girl i like "my wifey"?

So me and this girl have been talking for about two months now, I've talked to her before but only as friends, but we are getting pretty serious but we are not going out yet....I call her babe, baby, ect. And she calls me names like that too....is it okay to call her wifey or is that going to be awkward since we aren't really boyfriend and girlfriend yet