Apologize

• Start by winning her over by purchasing a cute note card or stationery sheet. She doesn't need your "I'm sorry" on the back of a crumpled grocery receipt. The first words that you write should say that you are sorry. Tell her you apologize for hurting her feelings in a way that works for the best of your relationship. If the two of you are complete goofballs, you might start your apology with something silly like, "I botched it up again, I'm sorry." If you're known for being a romantic sweetheart, perhaps you just tell her in that special way that normally lights up her heart, "Baby, I love you so much and I'm so very sorry." Even if you're an aloof boy who knows nothing but you want to do what it takes to make it better, write, "Roses are red, violets are blue, I can't believe what I did to you."
  
  

Empathize

• She's not going to believe you're really sorry unless you say it. Explain in your note why you're sorry and recognize what you've done to disappoint her. Part of her calming from the situation is knowing that you at least understand why you made her so upset rather than just apologizing so you're out of the doghouse. Tell her exactly what she means to you and what being with her means to you. Give her details on those moments that make you the most happy when you're with her. Tell her how it would feel if all of what you two built was taken away because of what you've done.
  
  

Don't Criticize

• Don't throw in little jabs at her in the note. The last thing she needs to hear is, "I know you don't like to ..." or "Since you spend all your time with your friends lately, I figure I would ..." Keep the focus on what you feel, how you can make it better and what you can do to show her how sorry you really are.
  
  

Analyze

• Decide whether the situation is fixable and offer a resolution. Perhaps you two can go for ice cream or dinner later as a peace offering for something small that you've done. If you did something really bad, you two might need time apart. Offer your suggestion so she understands that you just want the best for her to get over things and feel better.