Looks more like a crazed smile bc he's like "th'they can't die" but still worried about it and he wants to kill the knockers now and- well anyway, it's not really a happy smile.
Why do they always run away whenever their love interest is with some other people? I get it if they are dating and the dude is hanging on to some other chick, but come on... He's with 3 other people and they are literally just walking (╯°Д °)╯╧╧
I want to pick you up and put you in my bag, you adorable cinnamon roll