There's no getting around it; sex is a vital part of most marriages. So what happens when one or more parties lose interest
The Do-It-Yourself Solution
No matter how much your spouse loves you or wants to please you, s/he might never have the same sex drive as you. Therefore, it's unreasonable for you to expect your spouse to be at your beck and call every time you feel sexual. You need to take responsibility for satisfying your own needs from time to time. In all likelihood, you are already doing this, and you don't need me to tell you to do it. However, you might be feeling resentful about it, and that's not fair. Although it is my hope that your spouse will invest more energy into your sexual relationship, there will still be times when you're ready to roll and s/he isn't. That's normal, and you need to accept it. As long as your spouse is making more of an effort to understand and care for you and your needs, you need to work harder at accepting your differences. And part of this acceptance entails taking care of yourself occasionally and feeling fine about it. This will be easier for you to do once you truly feel your spouse cares about you and your feelings. And hopefully, if that isn't happening already, it will, very soon.