AITA for getting naked in front of my friend’s dad?

I (25M) am a fairly average guy, about 5’8” 140 lbs. I wasn’t blessed with the gift of a body, but I am working on it.<br><br>My friend Jake (25M) is…well quite the opposite. He’s a bodybuilder who works out 6 days a week at 5am. He also eats an insane amount of calories to fuel his muscle gain. It has REALLY paid off. <br><br>Jake and I have been friends for a couple of years. Ever since we met, he has been wanting me to start going to the gym with him. I kept saying no, but after he invited me for the 100th time, I decided to finally say yes.<br><br>The first time we went was awkward. I locked myself in the locker room for about 10 minutes crying because I felt so embarrassed about my body. Jake could tell something was up when I came out and he asked if I was okay. I told him what happened and he reassured me that nobody was paying attention to me.<br><br>But they were. I know they were. I could feel the burn of stares when I was working out.<br><br>Looking back on it now, I probably should have listened to my instincts and not gone back.<br><br>But I did. For the past year, I have gone to the gym with Jake every day.<br><br>It has NOT gotten any better. In fact, it’s gotten much worse.<br><br>What used to be casual glances now seem to be full on stares from everyone.<br><br>Jake and I have a shared sink routine where we both wash our faces with the sink in the middle of us. It’s always been fine. But lately, I’ve noticed that there is now another person on the other side of Jake.<br><br>It’s Jake’s dad.<br><br>Jake’s dad is a very fit older man who also works out at the gym. It’s become a routine for him to also wash his face at the same time as us and talk to Jake about his day.<br><br>Today it escalated beyond just him looking at me. When I was walking to the locker room, Jake’s dad said “you have really come a long way”. Which I assumed was him being nice.<br><br>But when I was washing my face, he said “wow, you’re really starting to fill out”. I was extremely confused by this remark because my appearance has not changed at all. <br><br>Jake and his dad left the sink before me and I decided to ask Jake what his dad meant. Jake just said his dad was being nice.<br><br>But I’m not skinny. I’m fat. I know everyone at the gym thinks that. That’s why they stare.<br><br>I was lost for words so I just said “okay”. But something told me to go back and ask Jake’s dad again. I went back to the sink and asked him to elaborate. <br><br>He said “well you’re skinny, so you have nowhere to go but up, right?”. I was stunned. I tried to say “I’m actually fat” but before I could get the words out he interrupted me and said “don’t be shy! Every man starts somewhere. Even me. I used to be YOUR size when I was younger than you.” <br><br>This comment absolutely floored me. <br><br>In a rage, I got my things from the locker and went into a stall to change. I was so pissed that Jake’s dad had basically called me a child. I thought I might actually cry. <br><br>I don’t know what made me do what I did next, but I just did. I walked out of the stall completely naked and up to the sink where Jake’s dad was still standing. I just stood there with my back to him, washing my face and staring at him in the mirror with the dirtiest look I could.<br><br>It was complete and utter silence. Nobody was breathing. <br><br>I ended up standing there for about 40 seconds before Jake’s dad said “alright then”. <br><br>He grabbed his things and left. Jake followed. Jake kept looking back at me and he did not look happy.<br><br>He just called me and said he needs to talk in person. I can tell he’s pissed that I disrespected his father. AITA for doing what I did?