I'm going to ghost a guy after the first date
Why would you ghost him after the first date?
He had a lot of shit on his mind. Plus he told me he has issues with commitment.
Someone with a lot of baggage is not going to be a good candidate for a future fiance, so you might be on the right track. For what it's worth you should still be upfront, tell him the truth, and lessen all of the worry and wonder why you did it. He will start to worry about himself if you just not say anything.
I'm sure he's fine and free of any emotional pain . The conversation was going in the wrong direction.
I still think you should be honest with him and tell him it's not gonna work out.