Sometimes that happens to me. I just got done time traveling to make up for a little over a month that I hadn't played. Though it was partially boredom, and partially I didn't have time to play it.
Yeah life gets busy, then I really play a new town a lot and an older o e falls behind and I pick that up and I break for life but I think having various different towns keeps me from getting bored with it..I actually have less time to play then I'd like ATM but I try to fit it in at night it helps as I have trouble sleeping so I play until tired.
I stopped for like two years and then tried to come back to my first town until I realized I lost it and so I am rebuilding a new town. I don't think I will ever get over it