I'm going to be a soldier. What message should I send to my friend?

I'm going to leave home for a long trip. Please forgive me for leaving without saying goodbye. I really don't have the courage to watch you feel sorry for my leaving. Your smile is what I want to keep in my heart. Life outside will be lonely. Your support will be my greatest motivation. Thank you for your long-term care. I really want to tell you that you are the most precious asset in my life. No matter where you go, I won't feel like I'm facing it alone. Say goodbye and wish you a happy life! Our friendship will last forever!