Why don't I ever get these (it's a scam by the way).
I love playing along with them and winding them up .... you'll probably reach a point where he'll end up asking you for money. It'll probably be a relatively small amount at first and then things will escalate from thereon in.
I'd be playing along and probably ask him to send me a few quid first, because my bank account has extra layers of security imposed by the bank to protect my HUGE stash, so any payments made, can only be paid to someone who has previously paid me ..... pass them along to me ..... I'll sort 'em out lol.