Tina went all in, chasing love like her life depended on it.

Days rolled by, and I watched her face sink in, looking like a walking skeleton.

Her collarbones jutted out so much, they looked ready to poke through her skin.

Watching her, I figured it wouldn't be long before her body just gave out.

But she didn't have a clue, totally wrapped up in her "diet victory."

Sure enough, one morning, Tina dragged me to the gym for an early run, without even grabbing breakfast.

After our run, while we were waiting for the subway, I noticed her sway.

I turned to look at her, eyes half-closed, cold sweat soaking through her gym clothes.

I'd seen this scene play out before.

Like clockwork, I reached out to steady her. "Tina, you alright? Feeling lightheaded?"

Tina weakly nodded, too out of it to even talk.

"How about a cookie? Or maybe some Coke?"

Her body, desperate for food, had her practically drooling, and I saw her throat move as she swallowed.

She looked longingly at the snacks in my hand.

I picked up on her cue and played along: "The cookie's 3,000 calories, and the Coke's 4,000."

Hearing that, Tina shook her head like she'd lost hope, closed her eyes, and passed out cold.

The subway staff asked if I needed help, but I waved them off.

No way was I letting anyone get chewed out by my bestie.

About ten minutes later, Tina came to, smiling weakly. "Low blood sugar? No biggie, just needed a quick nap. Glad I stuck to my guns and didn't eat."

Poor thing, you didn't nap—you blacked out.

But of course, I wasn't about to tell her that.

Tina's hardcore efforts finally paid off.

At the gym, everyone was sweating to build muscle.

Tina? She couldn't even lift the lightest dumbbells, and her yoga pants were hanging off her like they were two sizes too big.

She admired her skinny figure in the mirror, twisting this way and that, obviously pleased with herself.

Her little show caught the eye of Jake, the trainer.

Jake, with a smarmy grin that didn't match his good looks, strutted over and invited Tina to sign up for his courses.

Tina giggled, all shy, and said yes in a heartbeat.

The two of them were flirting up a storm at the gym, drawing stares from everyone around.

On the way home, she couldn't wait to brag, "Jess, remember how guys used to always hit on you? Well, guess who Jake asked out today?"

I rolled my eyes internally. Of course, it was because every time he tried something, I'd shut him down with a glare.

But on the outside, I played nice, "Well, Tina, now that you've slimmed down, you're the real stunner. I'm no match."

Tina giggled, all pleased with herself, but still tried to be modest, "Oh, stop it! You're gorgeous too. Don't worry, once Jake and I are a thing, I'll hook you up with his buddies."

I watched her with a knowing smile.

Karma's a dish best served cold, and I couldn't wait for her to get a taste.

Tina and Jake became official in no time, practically glued at the hip.

She flooded her social media with lovey-dovey posts:

"Love you to the moon and back—let's eat our way through the city!"

The pics were all about them hitting up trendy food spots.

Fried chicken, beer, Thai hot pot— all the high-calorie stuff she used to avoid like the plague.

Yeah, this was bound to blow up in her face...

Sure enough, after a month of radio silence, Tina finally reached out: