Start telling yourself that you are enough. Because, chances are, no one else will. My whole life I have been told repeatedly that I needed to lose weight, I was always made to feel that I was never good enough. This was done by people I knew, by friends, by family and in large part, by society. You all know this pressure, it starts when you realise you don't look like the "beautiful people", that you are different. It started for me when I was about 6. I didn't really look different then, but I felt different from everyone around me.
It's harder when this is coming from the people in your life. And, to a large degree, I don't think it's done on purpose but that doesn't make it sting any less. When you spend your whole life hearing that you need to change, be better, be thinner, be different than you are; you start telling yourself this stuff. STOP THAT BULLSHIT RIGHT NOW. No one else is going to be your cheerleader, if you don't do it for yourself and by yourself, it won't happen.
Losing weight is bloody difficult, and I don't mean the physical stuff - because compared the things that come afterwards, that stuff is cake. The hard bits are the emotional baggage, adjusting to yourself and fielding other people's reactions. These things usually happen during and after weight loss. Despite this, weight loss is still 100% worth it. If only for the valuable lessons you learn about yourself and other people.