Hello Jazz and welcome to the forum
I know what you mean, i used to always tell myself that its not so bad, there are people bigger then me so its ok for me to be the size i am.
As far as advice, maybe you could start to follow a program or count calories? Or maybe you could change the way you think by saying you want to get healthy not 'diet'
Highest Weight - 93kgs
Current Weight - 68.3kgs
Goal Weight - 65kgs
The wise man Stephen King once said - The only way to go on, is to go on. To say 'i can do this' even when you know you cant
You'll find me in the almost there section