[Somehow it seems really wrong to explain that post-breakup Stefan likes to drink away his pain, so he goes with the other reason he's been spending his time at the bar.
It's a legitimate reason, it just doesn't happen to be the only one.]
It helps with the cravings. [He was still have blood bags and whatnot back home, and he basically quite cold turkey after-] And after that thing with Sookie, I figured it'd be better to stick to my old diet.