A love letter is an easy way to tell your girlfriend exactly how she makes you feel. Handwriting your thoughts is a lot more personal than a phone call or email as it shows you took time to really think about her and your relationship. Unlike a phone call, she can hold on to the letter and re-read it over again. There is no right or wrong way to right a letter to your girlfriend.
Think about what you want the letter to be about. Tell your girlfriend how she makes you feel, what you like best about your relationship, or something that she did that upset you. Decide on a theme for your letter to help organize your thoughts.
Make a list of the things you want to say in the letter. This checklist will help you convey your thoughts in a thorough manner. You don't want to forget the intention of the letter.
Address the letter to your girlfriend. You may want to start it off by saying, "Dear Love" or "Sweetheart." If you include the date at the top of letter, your girlfriend can refer to the letter in the future and maybe reflect on your thoughts and feelings at the time.
Write what you're feeling. The first sentence should set the tone for the letter. For example, if you just want to tell her how much she means to you, you may want to tell her how happy she makes you.
Explain the reason for the letter. As you write the body of the letter, give her examples of what you're trying to say. If she makes you really happy, tell her what she does to make you feel that way. Maybe it's her smile or the way she looks at you. Whatever the reason, tell her.
Read the letter back to yourself. Look not only for mistakes in your spelling and grammar, but also make sure you said everything you wanted to say.
Sign off and further express your emotions. You could write, "I love you," "You will always have my heart," or simply, "With love."