....So, should i call him?

He hasn't called me.

But....

Maybe he is waiting for me to call him, and therefore has not called me?

Maybe he is too shy, and thus has not called me?

Maybe he is embarrassed because he had mustard on his cheek, and thus has not called me?

Maybe he thinks I wasn't interested in him, and thus has not called me?

Maybe he is trying to "play it cool", and thus has not called me?

Maybe he lost my number, and thus has not called me?

Maybe he lost my number, and the internet doesn't work where he is staying, and thus he has not messaged me to ask for my number again and then called me?

I think, probably, that the polite thing to do would be for ME to call him.