@falconer42
Hi there, I know how tough such a situation would be :( It's sticky for sure, because even though you've broken things off, it sounds like you still care deeply for him and would not want to hurt him. The thing is, for his sake and yours, it would be best to talk to him about this ASAP. Why drag this on for you? Why allow him to linger when he could use this time to face his fears that the relationship has ended, and possibly move on? My thoughts on it ofcourse. Ultimately, you know your life and relationship better than anyone else :)
If you do talk to him though, just let him know gently as best as you can. What is important is that you're genuine and honest, as you and him deserve that, considering the history you both have shared. The best way to do so is to focus on yourself and use terms like "I" instead of "You". So like, "I feel..." and so on. It's going to be hard for sure, but you can do it! Sending you strength and positive energy!