19 and overweight

Recently starting college caused me to gain the dreaded freshman 15, and after that partying and unhealthy habits threw on 40 more pounds, and guess what? Now I'm 19 years old and 160 lbs. Enough is enough and I need to step it up and gain some motivation because I feel terrible about myself. I need help staying motivated and staying strict! And that's where you all come in if you'll help me! Advice, motivation, love, anything really. I just need to find my self confidence again. Posting pictures is one of my fears now, and at every party I try to stay away from the camera. I don't want to feel that way anymore .