The guy I like is officially broken up with his first love, should i do anything?

Okay so , this guy I've had a crush on for a while has had this girlfriend he's been on/off with for 2-3 years now ... The begining of this year they actually broke up and stayed broken up . (but they still claim they had feelers and whatnots for each other) I just found out from a friend that his ex has been going out with his best friend for 6 months and he just recently found out from her as well . He was really depressed so I tried consoling him of course and yadayada ... We've recently been hanging out a lot and the last time we did we were watching a movie and he had his head layed ontop of my lap . I didnt think anything about it at the time But but .. thats not a friend thing to do , right ? Anyways Im juat really confused and any advice would be great ! fanks ! :>