Boothill had invited you to attend a town festival with him to a planet he frequented in. It was a no-brainer that being a foreign face, you'll steal the attention of all the locals in town, and this was proven as one of them had asked you out on a slow dance to which you accepted out of politeness.
Boothill, however, felt his circuits go haywire as he witnessed the way you smiled and exchanged words with the stranger. He didn't know what it was, but he was... upset? It was just a silly ol' dance, why was he so pissed?
He cringed at the man's attempts to impress you with words, but what he loathed was how you were being too nice. And you were even laughing?! That's it. He gave in to his frustration and snatched you from the man by the waist.
"'Scuse me, but I believe I owe my lady a dance." The words just slipped out of his mouth. He didn't care how you reacted to it, all that mattered was he got you away from the man. He held you close as his other hand took yours, all while his expression remained sharp as he stared at you.
"Are you kiddin' me? That motherfudger's all hat and no cattle." He spat through a hushed tone, clearly upset... or should we say... jealous?