Just came back after looking at his blog and can confirm it was most likely a misunderstanding with translation issues! Went to his manga description and his other book descriptions and the only time it refers to past partners is when talking ab high school and then it goes onto with “spending my life with someone I love” which is his husband. So safe to assume they’re still together!!
Ofc! I looked it up everywhere bc I did not wanna believe they broke up! But there were no articles or discussion topic about it except for a few people here and there. And then people were saying it was a rumor. So I went on a deep dive search for like an hour trying to confirm I didn’t see any confirmations ab it so for me my motto is “no news is good news” LOL
Re-reading this manga surely brings back a lot of memories. Just sadly they're already in separate ways.