Laugh at his stupid jokes. He knows you're not laughing at the joke itself and more at him for telling it but he loves seeing you face light up, it looks as if at that moment you realize that you really do love him. The way you laugh which then turns into a smile and you look up to him shaking your head with a huge grin across you face as he pretends to not understand why you're calling him an idiot.
When you get self conscious. He loves when you constantly ask him millions of questions about your clothes, hair, make-up or just anything you get paranoid about. You will ask him a million and one questions and then be conscious about how many questions you ask him. All along he will tell you, you are perfect but you will just ask again the next day.
Fangirl over him and the boys. As you used to be a 5sos fan every so often you will get a little starstruck about dating him and being friends with the other boys. You get really happy and excited when he invites you to a show or recording, always telling him that you never believed anything like this would ever happen. You will rant for ages about how you used to have your phone full off 5sos pictures and religiously follow them on twitter.