How to Write a Love Letter

               First Choose nice paper or stationery. Don’t email a love letter; give the person something they can touch, feel, and, if you’re lucky, tuck into their pillow at night. It's best to write on plain paper that has either a simple (for example, white), calming (for example, cream), or sensual (for example, flesh-toned) color.
    
     second one is more important
Set the mood. Go to a private room, like a  bedroom, put on some romantic music, and dim the lights (or even light candles). Make sure you won’t be interrupted. If you have a song or album that reminds you of the person, put it on; it will help you conjure up memories and feelings.
 
    Third one is Use an intimate salutation. Address the person as “beloved,” “dearest,” “beautiful,” “most cherished,” or, if appropriate, a pet name. If you are already in a romantic relationship, you can say “my” (for example, “To My Dearest ____”), but don’t do this if you’re using the letter to confess your feeling; it will come across as presumptuous and territorial. Instead, use something more detached like “To The Lovely ____,” for example.

              This another important step Think of a time when you felt particularly moved by seeing your loved one, no matter how small the event. Recall the moment in vivid detail; this proves that you were fully present and that all your attention was fixed on this person––something most people love to hear. Remember the emotional and physical feelings you experienced in that moment. Then, write a description of that moment including details about your feelings at the time.

         Fifth one is more tell the person what you appreciate most about them. Is it their compassion? Thankfulness? Beauty? Sense of humor? Humility? Resourcefulness? How do they make you feel every day? Do you consider this person your best friend? Can (s)he be counted on through thick and thin? Write about a combination of attributes––looks, personality, humor, charm––to let this person know that you appreciate them on a number of levels. 
      
          Sixth one is more write about the future. If you’re confessing your feelings for the first time, admit how giddy you are every time you know you’re about to see them again. If you’re apart, describe all the things you want to do together when you’re reunited. If you’re committed, discuss some goals, dreams, and fantasies you have about your future life together.

             This step is last one,
Sign the letter. Suitable sign offs include “Yours,” “Yours Forever,” “XOXO,” “Kisses,” “Love,” and “Love Always.” If applicable, include a pet name, inside joke, or even a reply to a long-unanswered question to make it more personal.

           Final one is come from Ur imagination but I'll give a example.. Add a personal touch. Put lipstick on and kiss the paper, spray the perfume or cologne you always wear on the paper, or trace your hand on the back so that the other person can hold their hand up to yours.