I think it depends on a person's past experiences and how long you have known them.

I've been married twice - both abusive marriages. Right now if I met someone and they said they loved me after a week or a month, I probably wouldn't believe them. If I had been involved with them 6 months or longer and then they said it, I might believe them. But again it would depend on the person, how involved we were, and how much I trust them. Maybe I'd believe them and maybe I wouldn't. It depends.

The only real way to find out is to ask him.