Fat when I start college?

I'm really stressed out because I'm fat, and I have to buy some new clothes. Yet when I do lose weight, my clothes will be loose and may look frumpy. So what should I do? I'm 5'4.5 and 125 pounds. Can I still look decent? How? Even with a curly/wavy hairstyle I was planning to have with my thinner physique? My goal is to be 100 pounds.