How do i lose weight?

i met this girl online and iwant to take her out on a date. i'm worried though that my weight will scare her off. she once sent me a picture of her and she is really hott. like blonde, tall, big cauldronss if you know what i mean ;P she is soo hott, i don't want to disappoint. i'm not sure whatt she sees in me but i can't let this girl who's almost hotter than hermione go. plase give me suggestions on how to lose weight.