Every diet works for the same reason, and every diet fails for the same reason.  Most diets are based on the same principles of eating more real food and being in a calorie deficit - this is a good thing.  Most diets are also based on eliminating foods you love, and not teaching you how to handle real life and social situations.

If you ever think "I can't do this diet forever, but it can work for now", then DON'T DO IT!!  Losing and regaining weight (yo you dieting) is the worst thing for your metabolism and it is proven over and over again that most people gain more weight back than they lost.  

Breathe.

There's hope.

Be patient.

Be encouraged.

You can do this and I believe in you more than you know!