A/N: these are slightly longer, so I'm breaking it up into smaller groups. Also, it'll be a breakup/their reaction/makeup series. If this is a confusing explanation, leave a message in the comments and I'll try to explain it better (sorry it's so confusing!)

Kirk: You had had it with Jim. All the cockiness and attitude and flirtatiousness. you felt like he didn't care anymore. You had finally snapped while at a party with him.
He was sitting at the bar, chatting up some pretty girl and hadn't spoken to you since you'd arrived. You looked away for half a second, and when you looked back they were kissing.

The betrayal felt like a shot to the chest. You stalked up to them and shot the other girl a glare

"Jim, can I talk to you for a sec?" You asked

"What's up?" he asked, and you noticed his pupils were dilated. He had been drinking.

"In Private" you added. A confused look crossed his face, but he stood up and winked at the girl he'd been flirting with before following you out of the room and a good way down the hall. When you had gotten a good distance from the party you stopped sharply and spun around.

"Really Jim? Am I that...that unimportant to you?" You demanded

"What? Babe, what're you talking about?" he questioned.

You gave a snort of disgust "You really don't know, do you?"

"Princess-" he started

"Don't call me that" You interrupted, "You know what, maybe it's better like this. You could never settle down, could you? I don't know why I thought I could change that" You felt like you were going to cry now, but you didn't want him to see you break down. You angrily unclasped the bracelet he had given you for your first anniversary and handed it to him.

"Goodbye Jim" You said. You could feel tears prickling in your eyes, and you looked away, shaking your head so your (h/c) hair fell and blocked your eyes. You turned and walked down the hall.

"(y/n)? (y/n)! Please, can we talk about this?" Jim called after you.

His plea echoed through your ears as you walked out of the building and shut the door behind you.

Spock: "What do you mean you're married?!?" You demanded, you and Spock had been dating for over a year, or at least you thought you'd been, but a Vulcan woman had just hailed the enterprise and claimed to be his wife.

"You must understand that Vulcan marriage is extremely different than a traditional Terran marriage. Monogamy is not a requirement if previously agreed upon between the couple-"

"But what about me, Spock, huh? Did you ever think that I might not be okay dating someone who was already taken?" You snapped, "Maybe I wanted a relationship more substantial than just being your company until you could go home? You know what, never mind, apparently I don't matter"

"(Y/n) I never said-"

"It's not what you said, Spock, it's what you did... Have fun with your wife"

Bones:

"Bones, you're going to get the patient killed!" You snapped. You were working with your boyfriend to save an intensive care unit patient in medical bay, but he wasn't listening to a single word you said.

"(Y/n), no offence but I need you to just back off for a few minutes, okay?" Bones said, scrubbing his hands in a sink and slipping on a pair of sterile gloves

"But you're gonna get him killed!" You pleaded, following him through the double doors to the prep lab.

"He's already at risk of dying, dammit this is the only chance to save him!" Bones argued.

"But you're wrong! I've been trying to tell you there's another way but you won't listen to a word I've said-"

"-would you just can it, (y/n)?" Bones snapped angrily "alright, I'm trying to do my goddamn job and you've done nothing but get in the way!"

You stopped dead in your tracks. That hurt. Bones was always a bit short-tempered, but he wasn't cruel,

Well, until now apparently.

"Fine!" You snarled "if you're that sick of me, consider yourself single now!"

_X_

A/N PT. 2: just wanted to give credit to the TOS episode "Amok Time". I borrowed slightly from the episode for the Spock preference.

Live long and may the odds be ever in your favor
-spock_is_in_asgard