That wouldn't happen if they didn't have amazing chemistry on a bunch of levels Indeed. I feel like he felt some connection, or something, toward Justin. Maybe under the lamppost, maybe in the first few minutes in the loft, maybe right before the hospital. Otherwise, despite Justin having nowhere to go, he still could have dropped him back off on Liberty Ave or somewhere along the way like any other trick.
Thanks for provoking such an interesting question, by the way :)