At least money problems, since they are so Universal, should be easier to talk about in the grand scheme of things. However, holding in resentment over money with your mate isn't really doing either of you a favor. So, while you're screwed either way, at least if you talk about the situation you'll both understand that neither of you is wrecking the other's life, which is a big plus for your relationship and ability to deal with life's little problems as a couple. At least it should be. Unless, of course, you blow your credit cards on a trip for two to Tahiti, in which case, at least you'll both be getting a good vacation for your trouble.
Sex is a much harder problem.
If your partner has taken to falling asleep early or pushing you away in favor of what's on the tube, don't let those pent up feelings get the best of you. If you keep getting the cold shoulder or brush off, kindly but firmly explain to your mate that you're feeling rejected. If you don't talk about it, you're eventually going to have some major resentment going on, which could have you seeking sexual solace elsewhere, like even the bathrooms at your neighborhood fast food restaurant. Of course, how much this bothers you is directly proportionate to how secure you are with yourself and how much of a sex magnet your mate is. AND THEN is okay.