I totally agree about NOT weighing yourself every day....I know we all have our own little rituals etc but our bodies can fluctuate so much depending on TOTM, how much fluids you have drunk, going to the loo, exercise etc, that when you weigh yourself daily and you 'appear' to have not lost anything, or worst still, you seem to have put on a pound or two (which in reality you haven't, but is still followed by mild bouts of hysteria trying to work out where the weight has come from, or if you have sprouted another ar*e overnight....), all I think it ends up doing is making you feel totally demoralised, followed by questioning everything you are doing & it's just then, when we are feeling really low, that is when it is easy to self-sabotage.
I think you should weigh yourself on the same day every week, say after having a wee in the morning when you first get up...then you must really resist trying to keep jumping on them!!!! If you really can't stop, then ditch the scales & go to Boots once a week....at least that way you are getting a better reflection of how your weight loss is going.
I personally think one of the reasons of having WLS is to break the sort of dysfunctional relationship we have with food and that includes obsessive weighing....it doesn't make you lose weight any faster!!!!
A quick question...do you/have you measured yourself, as I have found that is quite a nice way to every so often keep track of how you are doing....even when you may not be losing the pounds, you are still dropping inches which is a lovely way of knowing you are still on track.
Finally, I think a banana and a milky coffee is absolutely fine for breakfast....it's more about literally breaking the fast that you were in overnight when asleep, and kick-starting your metabolism for the day, than it is necessarily about what you are eating (to a degree). What about home-made fruit smoothies, yogurts, half a slice of wholegrain toast with LF spread, a wholemeal crumpet or muffin etc?
As for lunch..it sounds like you may be eating the same foods alot, hence why the boredom & food apathy may be creeping in...try to have an afternoon where you can sit down and trawl through books/websites for recipes etc, and try to plan out meals you fancy trying, then make sure you have the ingredients in you need. You don't need to spend a fortune, I think it's more about getting organised...I find it helpful to do a batch of cooking at the weekend & freeze stuff, so the food is there already made. You could think about nice thick home-made soups, stews and casseroles for lunch now it's getting cold xxxxx