Being a vampire hadn't been your choice. It was unfair of the other hunters to judge you before even speaking to you. It was enough for them to hear about a vampire turned vampire hunter. Just because you were a vampire didn't mean that you had to kill people.
Cattle blood was a substitute. You could get by with that. Sure, it was disgusting but it was better than truly becoming a monster.
After a few years of your cattle blood diet, you'd stumbled upon the Winchester Brothers. Once they realized that you truly meant no harm to anyone, they'd let you go. Over the years you'd even helped them on a few cases.
That was why it upset Dean so much whenever you stormed out of the Roadhouse, tears running down your face. Overhearing the conversation of some of the hunters who still thought you should be ganked hurt like hell.
"Don't run so damn fast!" Dean huffed as he finally caught up to you. "And, don't listen to those damn idiots."