What have you got yourself into? Nothing that you cannot easily get yourself out of.
"He's a pro masseur". So you are probably not the first customer he's slept with, and he's probably said the same things to the others: "I laaav you!", " I miss you!" and "when you kum baaak?"
Do you really think he would be terribly crushed if you blocked him on Facebook? That's hardly likely since you and he were never able to communicate.
This does not appear to be your first encounter with SE Asian bed partners, so your quandary is surprising.