What are cute things that I can write to my boyfriend in boot camp?

I tell him what is going on back home (no bs or anything that would trouble him). I tell him how much I love him in each letter and that I'm supporting him 100 percent and how proud I am but I'm starting to run out of cute things to say in my letters. I don't want to just go on and on about something that doesn't matter and I don't want to repeat myself with what I write.