need serious motivation before holiday

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Hi guys.. im 26 and currently weigh 14st, 8 years ago i weighed 8st which i was happy at i then went on to the depo contraceptive injection and slowly over the 8 yrs put on the weight, my eating habbits never really changed over this time but the weight kept coming which i was told was one if the side effects....

So now here i am i came off the depo in november 2013 and have now just booked my holiday to orlando in october this year, so i obviously want to loose the weight...im finding it a little hard to start one of the reasons my partner eats no fruit veg etc... so im convinced its a waste for one


If anyone has any advice it would be great to get me started i now drink only water, i have never eaten bread and very rarely eat cheese etc...