He then said he’s not well in his head, and that we could talk later, because he quickly wanted to go to an extra AA meeting
I am not ready for a relationship
Hi Lykke, glad you found the forum but sorry for what brings you here, of course. I'm sure you are very hurt and confused.
He did actually tell you why he broke up with you. He is happy with you - as in you the person you are - but he can't handle the relationship, two different things. It doesn't sound like he means you personally at all, but that doesn't change how he feels about how he's doing.
His sobriety, if that is the issue, is the most important thing to him, it has to be. He's only been sober for 10 months and while that's really good, it's not that long. He may not have as solid a footing in sobriety as he wants to achieve and that he needs. He may not have realized that until now.
Hopefully when you meet tomorrow you will get more clarity.