AM, I'll be repeating myself but will say it again. Yes you need to leve him alone. In sorry you have to deal with the uncertainty but who isn't? on this forum. This is our true test whether if you love this man enough to let him figure out his life.
It's so scary my H said exactly the same thing when he first dropped BD 4 months ago. He said he finally has courage to tell me his honest feelings, to tell me he needs to be happy. Like you, I knew I was controlling but I always thought I let him be involved in important decisions. He's a very laid-back H so I guess you an say I took that for granted. I said in my thread but the truth is he tuned out because it was always about what I wanted, what he had to do to make me happy. So when he reached to the point where he felt he couldn't make me happy, he felt he needed to leave. The truth is he was making me happy but I simply didn't know how to show it.
You need to make him feel like a man, let him be back in charge.
One last thing - I would be very careful with all the questioning if I were you. The biggest mistake I'd done 4 months ago - I asked many questions because I thought that's what would clear up his mind. Big mistake. He said he felt interrogated.
M37 H36 M8 T12 inc 3yr L-dist 7/12:H broke down 10/12:H dad D frm W4. BD soon after 1/13:H wants to leave 2/13:H gpa passed. Feels closer but H still leaving 3/13: S begins