I'm not an expert but here is a thought and it's sheer speculation. Your h checked out long before his space announcement. He actually probably considered himself single as soon as he told you, considering that just a formality.
Again, he may not want to look * bad* so he softens it by saying we broke up and are still friends. He can make himself appear to be a good guy. Most peeps don't want to announce they cheated on their W.
Your feelings and questions are totally normal. Hang in there:-)
3 kids BD 12/15/13 (IDKIILY. ) Rope dropped Cirque du Soleil style D final 9-9-14 "Some people are born on 3rd base and go through life thinking they hit a triple." Barry Switzer