Hiya, I had my bypass in June last year. For the first few months I felt no hunger at all, but I could tell when I needed to eat as I felt a bit empty and weak. I did feel occasional hunger if I had gone all day without eating. Now I find I feel hunger at normal times - especially when I get in from work. But now just a small amount of food feeds me and carries me through to bedtime, and I do go through stages of getting home, raiding the fridge and finding there's nothing I want to eat so I have some sliced chicken just to keep me going. Before I would have eaten crisps and sandwiches and pasta until I could no longer move - way past the point of fullness.
I also find during the day at work if I'm hungry or bored I have a milky coffee or tea and I feel sated until meal time.
I do get cravings for bad food, but luckily for me cheese makes me ill now. So no pizza for me, which is the thing I want the most!! Now I'm 10 months out I have to be stricter with myself because I've discovered bad things I can eat easily: biscuits (pretty sure I could eat like 100 at a time but I'm not trying it!), non-oily crisps, butter, potatoes. All of these things appeal to me more than the things I actually do eat, but I only have them occasionally. And nowadays it's more a case of wanting to eat, rather than needing to. Bad habits definitely creep back in, like snacking. But I snack on good things (vegetables, nuts) rather than crisps. The loss from the early days when you don't want to eat at all gives you the motivation to stick at it
and because you're used to less food, a huge meal no longer has the appeal. Like I won't buy a sandwich (even though I love bread) because the time it takes to eat it and the effort needed is too much bother for something I know I shouldn't have. If I have no other options I'll buy one and eat the filling only.
So it will take a while but the hunger will come back. You just have to make smart choices as much as possible! But yes by the time you get there hopefully you're in a new routine and have more motivation to keep on going