Remember how he makes you feel, and how you feel when you are on your own.
That freedom of choice you have should be there all the time, even in a relationship, so the fact that it doesn't happen shows that your relationship is disordered.
It's not you that took away that freedom, it was him, and he still doesn't recognize he is wholly to blame, because he keeps bringing it back to you both needing help, when actually it's not you at all.
By trying to bring it back to you both getting help, he is trying to make you believe there is something at fault with you and how you are in the relationship.
Did you take away your own freedom? Or was that him? Why would you need help in this scenario? If he can't accept that it is his issue, then he is not going to change. He is saying things in the right direction, but it's pretty apparent that he doesn't really believe he is at fault, he is only saying what he thinks you need to hear to get you back into the place he likes you best, under his control.
A man who wanted to change would accept that this is his issue, that he needs to get help, and wouldn't pressure you to get back together until he has sought that help. He would be more reasonable, and he wouldn't try to blame you too. That's him using guilt to exploit your feelings in an attempt to control them.
Your story may not be awful, but with a man who doesn't actually accept that responsibility for that behaviour, and tries to imply that you are somehow also at fault for him behaving in that way, it may well end up just as bad if you go back. He doesn't show the signs to me of a man who is sorry for his behaviour, he sounds like a man who knows he has pushed you to the point of leaving, and he has to make the right sounds to stop that happening.
I got all this, the sorry and the reasonable "you take some time to sort your head out" (implying that actually the problem was in my head due to my mental health), the money to get me to come back for Christmas, and the "I love you" and "we'll fix this". When I made it clear I had my plans and I wasn't going to change them, he turned and got mean, directly blamed me rather than indirectly and actually made things up to make him out to be the injured party and me the unreasonable one. When I decided to ignore that he became outright threatening, and stalked me, called me an abuser and made me feel very unsafe. They begin with the "sorry, but" and escalate trying to bring you back into their grasp, and when they don't manage that, they want to punish you.
So I would say feel sad about the end of your relationship, that's okay, but don't let him use that to make you feel guilty and try to manipulate you back. If he really wanted you back, it wouldn't be manipulation he used, but showing you that he has actually made the effort to change.