You had been in Rick's group since Atlanta. The journey to Alexandria was hard on everyone but especially you. You killed more than you could count, humans and walkers. You lost your older brother and late-boyfriend along the way. Always ended up in the worst of the worst situations.
You distanced yourself from the group most of the time but you stuck by Rick when push came to shove. Out of everyone in the group, he was who you spoke to most.
You were capable. You were strong. You knew that, everyone did.
Rick was speaking to your group and Alexandrians about the horde of walkers in this pit-like thing. Entrance blocked by a few trucks that they slowly got through. He needed the horde to move. Which meant he needed man-power.
You offered yourself up, you would pair up with Abraham to help. Hell, no one else was volunteering and who better to do it than you?
"No, you're staying here." He immediately shut you down.