Unfortunately, if you're a girl, sometimes a boy will say you're ugly. Nobody likes this, right? And chances are, after that, you'll wonder if he's serious and get nervous. Will you let him get away? Was he serious?
Steps

Step 1. Consider who said you are ugly
Is it your best friend? Is it likely to be a joke? Or a boy who seems to hate her and insults her almost every das? Or your mean ex-boyfriend?

Step 2. Get a good answer
If he's just teasing, make a little joke back. If he's just bad, respond or ignore him. If he's your brother, let your parents handle it.

Step 3. If you start to wonder if it was just a joke or not, take a look in the mirror
If there's something you don't like, like your hair or your clothes, change it. But don't do this for anyone but yourself.

Step 4. Don't let it ruin you
It's just a nasty comment that shouldn't spoil your day. Walk with confidence and have fun.

Step 5. If it's your boyfriend, get someone who isn't an idiot

Step 6. Have class
If you understand that “ugly” is a childish and meaningless insult, respond in a very adult way. Thank the boy and tell him he is very kind. And then go away. They go crazy when you don't get upset.
Tips
- Boys only call girls ugly when they have nothing else to say. If he really wanted to hurt her, he would say something more personal. “Ugly” is nothing personal, just an empty display of anger. Think that if he called you ugly, it's not because you're ugly, but because he was so angry he couldn't find a better insult. "Ugly" is a vague and silly insult, as offensive as "papaya face" or "silly."
- If it's a boy you like, and he's discovered it recently, he's an immature guy who's thinking too much. Ignore it and let it go. Don't think about liking him anymore, he's an idiot who needs to grow up! There are other boys out there.
- Do your best not to care. You are a unique individual. Don't let others affect you.
- Don't change anything about yourself just because he wants to. Any changes you make should be for you alone.
- Unfortunately, girls who aren't popular can be called ugly by boys just because they are – because it's cool, because they want to show up. But the big possibility is that they don't really think that!
- To feel beautiful, every morning, look in the mirror and tell yourself why you are beautiful inside and out. Name 10 things you love about yourself. This will give you the confidence to put those comments aside.
- Remember that some boys who have a girlfriend will say you're ugly just to please that girlfriend, even if they don't think so.