I would suggest talking to him, but don't be suprised if it doesn't help. If you believe it is your changes then decide if there is anything that you can or would like to do about those issues and act accordingly irrelevant of him or his sexual desire. Maybe that would make you feel better about yourself either way as it seemed by your post that you are a little concerned about the chanes. Just a suggestion. 30 year old men are interested in sex....trust me! Maybe it is the role changes as well since you moved in together, it is easy to fall into a rut.