Well it is your marriage Michael but it does not sound like your wife is enjoying your sex life very much and that is not a very good thing.  You don't sound all that satisfied with it either.

I agree with you that sex is not necessarily a proof of love from women or men but in a marriage when you are in love with your spouse it is one way of enjoying love together.  Again this does not mean you have to dribble romantic quotes while having sex, and for some, like myself, that would be a turn off until after intercourse.  This is largely, if I have to think that much during sex, I can't enjoy the sex.