Halsey's relationship with her new rocker boyfriend doesn't look like a drag -- the 2 seem to be totally into each other ... even when they're just standing around smoking.
The singer was spotted out in WeHo Thursday night with British musician Yungblud, enjoying a cigarette and some PDA while they waited for their ride. We're told the couple had just left a dinner date at Jones Italian restaurant.
Halsey's been hanging with her slightly younger beau since at least November, shortly after breaking up with G-Eazy ... for the second time.
Looks like they're still going strong well into the new year.