My wife and I have been married for nearly ten years and have three kids. We have sex about once a week if I'm lucky. My wife complains that I am grumpy around the house, which I am. I'm frustrated sexually and am sick of having to masturbate on a daily basis because my needs aren't being met. I am aware that acting resentful works against my ability to get laid by my wife, I just can't seem to supress my resentment while around her. Any tips?