My husband and I have been married 8 years, we were also 18, and since I've been working on getting sober, our sex life has changed as well, it went from nearly every day to maybe once a week or once every two weeks. :/
Not just on my end, he's been working a lot more at a very physically demanding job, and is often exhausted when he's home, but I'm not really up for it anyways.
I guess really, there are a lot of factors to consider, and to look at the big picture of things when it comes to a sexual relationship.
I thought maybe it was just me, that maybe I was putting so much effort mentally, physically and emotionally in sobriety that other things kinda were put on the back burner. I'm glad you posted about this.. its good to open the conversation airways and vent about it. I'm positive that we're not the only ones that have had this or a similar situation.