Oh yeah. I'm 3.5 years out and the honeymoon has long been over. If I weren't extremely careful about what I eat, it would be terrifyingly easy to fall off the wagon and jump on the regain train. The surgery still helps, for sure; even when I eat too much, I think back to how much I would have eaten before the surgery and realize that my overindulgence now pales in comparison. But it still takes a lot of effort and attention to maintain my weight.
My first recommendation for you is to get back on the scale and see exactly where you stand. No matter how much you've regained, stepping on the scale isn't going to change it. Believe me, I understand not wanting to know (take it from someone who did not own a scale for over a decade before my surgery), but staying in denial will only make things worse.
I found a fantastic podcast called "We Only Look Thin," hosted by a husband and wife who each lost over 100 pounds. They did NOT have WLS, but they have so much insight and advice. They address a lot of the things that you worry about, so if you are open to listening to podcasts, I highly recommend this one.