Some tips to make your girlfriend happy:
a) Admit when you’re wrong and don’t be too stubborn. If you have really messed it up, you might want to plan a special date to apologize. Don’t just apologize though, back it up with actions. And always give her a cooling period if she’s really mad and then offer to work it out.
b) Go out of your way to spend time with her but give her some space too. Try to clear enough time for a romantic dinner or, more casually, a movie. If it’s just not possible, at least make the effort to talk to her, but don’t overdo it.
c) Never cut her off or act uninterested in what she has to say. That’s not to say don’t interrupt at all-sometimes what you have to say can’t wait.
d) If your usual first reaction isn’t a smile, there may be something wrong with the relationship. If you’re just having a bad day, put it aside and grin. A hug can’t hurt once in a while either, but don’t crowd her or struggle to build up a budding relationship with losts of affection.
e) Do not show romantic interest in her friends. Not even a single one of them. That’s the biggest blunder you can ever commit.
f) Laugh at her jokes. If they’re not funny and you’re not good at faking, don’t try- a fake laugh is much worse than none at all. At least smile; everyone likes to think that they’re funny.