My apologies for the problem I may have caused. I think it’s fair to recognise it.

Alice, the advise given to you make lot of sense. Being very cautious and if you are ready to meet him, do it on a public place and tell other people where you are gonna go and stay. Obviously, you are not gonna know the person on a first date, so until you feel safe, meet him on public places and be sure other people knows about where you are going to be and with who.

I can’t give you many insight since it takes me a lot of time to know where someone I meet is coming from.
The thing about Perfectionism exists. I have it. According to the doctor strong traits of Perfectionism. Of course, it’s not a path of roses nor for the individuo who suffers it or the people around this person. It doesn’t mean he is gonna be a person impossible to deal with, there are Perfectionist many different to others. It depends on the pattern of parenting they had and which defence mechanisms they used to deal with. The good sign is that he’s working on this issue.
The read flag is what Divine mentioned, if he’s in a dating web site, he should be ready to share about himself. If he persists on this behaviour I would think about giving him another meeting.

Wish you luck!!!!!