Letter to my bf pleaseeeee help!!

Hey y’all I’ve been writing letters to my bf well since we first started dating and I don’t when to give them to him. Need help to find out when..... and we’ve been together for two years now and I love the idea about giving them to him before we get married like the weeks before the wedding but idk. The balloon is are first valentines and he’s always gotten me pandas and the flowers from are first anniversary.. and I’m still adding to the letters❤️❤️ please help