Hi there!
I remember when I was around 15, 150 lbs sounded HUGE - (I'll NEVER get that fat). Years later, at 243 (!!!!), 150 sounds like a great number I think that eating plans are great, but there is a HUGE psycological component to dieting (otherwise food restriction would work for everyone and be sustainable!). I found the book "The Thin Commandments" to be interesting in addressing these issues, but there are lots of other similar books to be read. Also, a support group for weight loss might help, such as Weight Watchers, or TOPS, or others. I know you are in Hong Kong, but if you go www.weightwatchers.com and plug into the international locations tag, you will find meetings close to you. Of course, 3fatchicks is a great support forum! I find that I need face-to-face contact as well as this forum, but everyone is different. You aren't alone! Keep it up!