I can sort of relate to OP as I haven't started up AS in months but the reasons are different. It's not that I lost interest, I just ran out of things to do. I beat every line on the Maison, got all the mega stones, caught all the legendaries, and finished the national dex. So unless I start doing more shiny hunting and competitive battling I have nothing encouraging me to play the game. Because of this, I now spend most of my time trying to beat the Platinum Battle Factory (I have never gotten that gold banner). So you might want to try something like that. Just play a different game, it will come back in its own time.