How should a person who wants to join the army write to his girlfriend?

Dude, I'm going to join the army this year, but I haven't told my girlfriend I'm going to join the army. Wait until a few days before I leave, tell her I'm going to serve my country. Stay at home and don't run around. Don't worry, I didn't have a chance to have sex in the army because you made me uneasy. So, if you really like me, you can wait for me for two years, and I will come back soon! I love you forever ~ ~!

This is what I want to say to my girlfriend!

Hehe ~ I'm going to join the army, too. We may even become comrades in arms!