This really isn't fair to OP.

When a relationship progresses from "dating" to cohabitation, usually the man picks up the lion's share of the bills. Rent/mortgage, groceries, utilities.

I've known VERY few where the couples had a true 50/50 split on finanacial obligations.

Everyone knows/accepts this going in without it being explicitly discussed. Even though, it probably should be explicitly discussed.

If OP was paying for restaurant dinners, entertainment, and buying her clothes, gifts etc before the move-in, and he suddenly stopped doing those things after the move-in, then she'd have a right to say "hey what's up with that?" By the same token, OP has a right to say in the face of the new-found frigidity "hey, what's up with that? That's not what I expected when you moved in here".

Relationships shouldn't devolve to the point of tit-for-tat but by the same token there has to be give and take. Otherwise one person is the taker, the other is the giver, it's unbalanced and unfair.

OP needs to re-evaluate their situation and realize they should be with someone more compatible and whose idea of give and take isn't going to change when their address does.