I'm down from 135 KG. But I had been fatter before.
Then you're already doing very well. Just got to keep progressing and make sure you don't rebound. A tip is to avoid thinking in very dramatic terms of if you backslide on a day thinking "Oh, I've failed and can't do this". If you have a day or a morning where you backslide don't let that be an excuse to give up - just go right back to what you should be doing. You've already proven you can.
Just to maybe put my previous post in slightly clearer terms, there are two factors going on with sugar. The first is the loss of balance - that's like cycling down a road and something hits you from the side and you go wobbling in one direction, overcompensate and go wobbling in the other and you're back and forth careering all over the place. That's the sugar high-low cycle. It's very hard to resist that because your body is desperately trying to right itself and if it's crashing, it cries out for the sugar to course correct and you actually really feel crap for really real reasons - your blood sugar is all out of whack. Usually about three days cutting out sugar will help your body get out of the crazy swing cycle and have regained a balance.
Now what you're left with is the second factor - psychological / habit / comfort. This is not a negligible thing and still takes effort and planning to overcome BUT it is a much weaker force than the first because it's not the same actual real biological process causing real physiological effect of blood-sugar crashes and huge insulin spikes. Whenever you have a sugar-splurge you're going to need to re-find your balance (which you can do) and then you're back to mending your habits and steady improvement.
BTW, just to add on to the advice of finding a substitute and planning things out, this is good advice but make sure you don't overdo it and just think "hey, I can eat as much as I like because it's not X". Like devouring blocks of cheese instead of chocolate bars!

My own substitute was Huel. I'm very much not a fad type person but this is non-soy based, high in protein and really, really low sugar. I get the chocolate "Black Edition" and it helped me get out of a sugar-dependency as my substitute because it actually tastes really good and satisfied the chocolate craving. Not saying this is better or worse than other people's (or cheapest), but just that this is the one I used for this technique.
Good luck and keep posting here for encouragement and support.
Also, as I think you said one of the problems is what others have in the house, be open with them - tell them you're really trying to turn things around and could they keep their snacks in their room (if housemates) or if family ask them to help avoid that stuff in other ways. Support from those around you can really make a difference and there's nothing to be ashamed of in trying to be healthier.