I Caught Feelings for My Gym Buddy and I'm Panicking

I need to type this out before I lose my nerve.

I (28M) have been working out with my gym buddy (27F) for about a year now. We met because she asked me to spot her on bench — she was repping more than me, honestly — and we just clicked. Same schedule, same goals, same taste in gym music (heavy bass, no lyrics, we're both unhinged about this).

For months it was perfect. Pure platonic gym partnership. We'd push each other, celebrate PRs, roast each other's form. She'd steal my pre-workout. I'd hide her resistance bands. Best friendship I've ever had.

Then three weeks ago she showed up with a new haircut and I forgot how to do a lat pulldown.

Like. I've seen this woman sweaty and red-faced and grunting through deadlifts hundreds of times. But suddenly she tucked her hair behind her ear and I lost brain function. WHO AM I?

Now I'm spiraling. Every workout is psychological warfare against myself:

She grabs my arm while laughing → I die
She asks to work in with me → my brain says "she wants to work in WITH YOUR LIFE"
She texts "legs tomorrow?" → I read it 47 times

The worst part? I can't tell if she feels it too or if I'm projecting. She's always been touchy. She's always been sweet. Has it changed or have I just started NOTICING?

I asked my friend for advice and he said "just tell her bro" which is the most useless advice any human has ever given. If I tell her and she doesn't feel the same way, I lose my gym buddy. I lose my schedule. I lose the person who genuinely makes me excited to wake up at 5 AM.

But if I DON'T tell her and she starts dating someone else, I will simply pass away mid-set.

I read this article about going from gym buddy to boyfriend and it made me feel less insane. Apparently this happens all the time? The shared endorphins, the physical proximity, the vulnerability of pushing your body together — it's basically a recipe for catching feelings.

Still panicking though.

If anyone's been here — either side — please. I'm begging. What do I do?

Update if anyone cares: I haven't told her yet. But yesterday she said "I can't imagine doing this with anyone else" and I had to go fill my water bottle for 10 minutes to recover.

Going through it? Share your story. We don't judge (much).