<human>: Provide a brief overview of the text.

Hello
I have a problem that's starting to become serious enough to maybe destroy my relationship.
Both me and my GF are overweight. I really want to lose it but I struggle with it. Im not so sure about her (She keeps telling me tho). 

The problem is that she always buys home junkfood, coke and so on. Don't get me wrong, I know it's my responsibility to not eat it myself, however as I said I struggle with it. If it's late at night and I am hungry it's hard to resist the urge or if I am sad. I never buy home junk myself. It's always her and she spends ALOT of money on it. I am talking about close to 150 euro on just coke / candy each month. 

I have tried to talk to her several times, calmly, angry, in tears and everything. I honestly feel like she is the main reason I don't lose any weight. I can start going to the gym 4 times a week and try to eat healthy for a week but then when I am really really hungry and she sits there with a bag of candy it's hard not to take one and then I am back to the same crappy lifestyle.

Our sexlife is getting worse because I am sad that I cant resist it and because I am mad at her for bringing all this shit in to our home when I know that if she didnt, I wouldnt eat it. 
It's effecting our normal life also because I really want to live a healthy lifestyle and try to workout, eat better and be more active while she does not. 

We have been togeather for alittle over 4 years and we have tried several diets without sucess, I have also tried everything I can think off to get her to atleast support ME losing weight. But nothing works.. 

So I seek advice on how to fix this. I know it's mostly my own responsiblity to not eat it but it's really hard when there is shit in my fridge and I am home alone or something..
<bot>: How can I get my GF to stop buying home junkfood etc when it's really making me super sad because I cant resist the urge to not eat when its there?