I think he knows that he can't expect noirin to be exclusive to just him at the moment, they both like eachother but they aren't gonna have a 'big commitment lets get married and never look at another person' chat after a few cuddles and kisses, people can be such hypocrites here when people start to date its ok to fancy other people as long as you don't do anything with that person
...anyway siavash is the one who has someone on the outside