Try to remember that you don't really feel better after eating that stuff tomorrow. It feels good at the moment you eat it but not for much longer.
To lose weight I agree with other posters who say concentrate on diet. I think lots of people (incl me in the past) believed if I did a bit of swimming I could still eat lots. You can't. I've lost over 3 stones this year doing no exercise at all.
You have to accept a few things ;
You'll feel hungry sometimes, but (assuming no significant medical issues) you will survive hunger.
You cannot eat things like chocolate/biscuits/crisps a lot. It doesn't matter if your size 8 best mate does - you can't.
You are probably eating too much at every meal. Cut your normal portion in half. You will probably not even notice.
It is hard. It is bloody hard. You have to be strict with yourself. If its your birthday ok have a pig out but not because "it's raining/I feel sad/my kids are playing up" etc.
I weigh myself every day. The scales may fluctuate a little bit but if you're not seeing at least 1 or 2 lbs a week then you're not being strict. The scales do not lie.
And more than anything, remember how you feel at this weight. No one else but you can change this. No one else chooses what you put in your mouth.
Keep repeating "Losing weight is hard. Being fat is hard. Choose your hard".
I only know this because I've done it this year after years and years of being fat and miserable. I promise if you can just grit your teeth and get through two months you'll feel awesome.
Good luck! You can do it!