Say you have two sexually-active adults with a history as "friends with benefits." Its been over a year since you've seen each other, and now you are both single. If the guy is willing to spend hours and hours simply kissing, talking, and spending time together, is it safe to assume he may be interested in a real relationship this time?
Eta: to clarify a bit, they've been hanging out for a few weeks, no sex yet, whereas before they would pretty much just "fuck and run." My friend is going through this and we disagree on the guy's motives. :)