I had the opposite experience in early sobriety. There have been quite a few threads about this and people seem to experience both. I think in general it's our brains adjusting. We were very conditioned to using mostly alcohol as a source of reward, it takes time for our bodies to respond to natural rewards normally, including the desire for it. Do you have depressive symptoms? Often this is also part of depression that some people have also after quitting. If you are not depressed otherwise, I would probably try to do things in the bedroom a bit differently to raise your interest and re-train your brain.