It's definitely something that needs to be talked about and thought about greatly. Don't worry though, the operations affect people in very different ways psychologically. There are always going to be experts to talk to about it so don't fear that you're going to be alone. People will talk you through situations, whether they be professional, friends or friends/members here in similar situations!
I wasn't worried about this before the op, but I'd be a lier if I said it wasn't on my mind. Luckily, since the op, my thoughts on food have changed dramatically! Where I used to see it as a relief to my boredom, I get up and do something now, where I saw it as enjoyment, I just see food as a necessity! I have been totally changed since the op. You never know, you might be the same!
So please, don't worry about it, the future could be entirely different, and if it isn't, there will always be someone to talk to about it xx