Guys are complicated

Gah. The last week has just been weird with my fiancé we have lived together about a year and things have just been different. He's been really moody and his sexual drive has plummeted we went from every day to lucky if it's once a week and I can't seem to win first place with him. He recently purchased a game counsel and I didn't have a problem with it, he went and told his co workers that I was mad about it, even though in the past little bit I have grown from not minding it, to wanting to throw it out the window because it gets 100 percent of his attention. Today, I worked a long shift came home to another day of him gaming and me being practically ignored. We were laying in bed and I was getting off the phone with my sister and he just gets up and storms downstairs in a mood and is sleeping on the couch and I'm left here wondering what the heck happened when I wasn't even saying anything.