*warning possible trigger * I just need advice.

So here's my problem. I used to have so much self confidence. I loved my body, I loved my life, I loved everything, I had no doubts. I had drug myself out of a hole. Well..i fell back in. Ever since I started working at my current job, it's completely shot my confidence to hell. Like I know I'm good at my job, it's not that. It's the people I work with. "Ugh I'm so fat I need to lose this weight." (As she steps on a scale and weighs 103lbs. All my female coworkers are gorgeous and fit, skinny or perfectly shaped. And then theres me. I gained 30lbs(I weighed 106 in August of last year) in a matter of months. I hate my body, I hate how i look, I hate my life now. And I can't seem to pull myself out of this rut. To make matters worse, I started talking to a guy, and he's perfect. He's amazing. But those insecurities just keep biting me in the ass. Sometimes I feel like it's not worth being around anymore. Like I cant do anything right anymore. I don't know what to do to get out of this.