Hurtful comment about my weight

I’m 16 years old and I’ve always ALWAYS struggled with my weight. I was never what I would have considered “fat” though I would use the word at times when I felt discouraged. I was always a few pounds heavier than I needed to be considering my height so that always made me a little chubby. I have fairly large boobs and really muscular legs. I’ve never loved my body and have tried many times to lose weight but I struggle with holding up the motivation to actually see progress. Tonight I was about to hop in the shower and heard my dad as my mom what size I was because he wanted to buy me and her shirts. I have no idea what the shirts are but anyways my mom said medium. I wear larges every now and then when shirts run small or if I want extra breathing room but overall on a day to day basis I wear a medium. My dad replied with “There is no freakin way shes a medium” here I am naked looking at myself in the mirror and overhearing this conversation about to take a shower and my heart sunk. I looked in the mirror and couldn’t help but think “am I really THAT fat” so it sounds bad but I cried for my whole shower. Hearing someone that means a lot to me and that I really care about point out basically my biggest flaw and then get me a large instead of a medium because that’s what HE believes I am hurt my feelings and really pissed me off. I know I wasn’t supposed to hear it but just order a damn medium and if it doesn’t fit then so what. It’s probably a dumb shirt with a stupid saying on it anyways. Well...I’m hoping that once I get over my initial emotions I can use this as a form of motivation. It may not sound like he did anything wrong to some of you but it really did hurt.

Here’s a lovely picture of myself :)