So we are the exact opposite, what do u think? DOSE HE LIKE ME?

Find out for sure if he always goes back to the girl you mentioned. If he does don't ask him over for the night. If you think nothing will happen over the whole night your wrong. Don't let yourself be used, you're better than that. The other girl is silly for taking him back over & over and you have to think a guy that cheats on his girlfriend with her friend then wants to go back to her; is that the kind of guy you really want anyway?