of her hair, face, body or clothes.. seriously don’t.
2. Overuse sarcasm. 

It’s one thing to joke, it’s another to speak sarcasm as a second language.
3. Flirt with other girls.

It doesn’t make us want you more, it just make us angry.
4. Cheat 

Never in any way will you get away with it.
5. Make promises they can’t keep.

 If you can’t follow through, don’t say it.
6. Say “I love you” when they don't mean it.

 If the girl you “loved” gained 300 pounds would you still love her? That’s what i thought.
7. Lie.

 You will get caught. Don’t ever under any circumstances try to keep a lie going with a girl. It will not work.
8. Deny things that are true.

 If a girl confronts you about something she knows the truth. Denying it makes her more angry. Grow some balls and own up to it.
9. Pressure her.

 If she wants to do something with you, she will.
10. Talk about other girls. 

Don’t say they’re hot, pretty, or even nice. We don’t want to hear it.
11. Talk to her about their exes.

 if you’re saying nice stuff, we’ll assume you still like them, if you say stuff, we’ll assume you’ll do the same about us.
12. Say stuff behind her back.

 No matter how much you try to keep it a secret, she will hear about it.
13. Be a dick to her in front of your friends. 

They might think it’s funny, but she will definitely not.
14. Try to make it look like something was her fault

 to get yourself out of trouble. It will make things much, much worse.
15. Ask why she’s mad at you.

 Say you were wrong and apologize. Do not say you didn’t do anything wrong. If she’s mad, you obviously did something.
16. Joke about wanting to break up.

 It wont be taken as a joke, and you’ll be single before you can tell her you were kidding.
17. Tell her she’s overreacting.

 If you thought she was mad before, prepare to meet the she-beast from hell.
18. Go to parties or hang out with other girls without your girlfriend. 

No matter how much she trusts you, she will be worried.
19. Make excuses.

 If you screwed up, don’t try to get out of it.
20. Talk to her when you’re mad.

 You will screw something up and end up regretting it