I don't understand the "making it harder" part. I'm not saying it can't/work, because I just don't know. But it does seem like playing games to me, which is almost always destined to fail. Why not tell just tell them that if you're serious, here are my requirements. They either meet them or they don't.
Because the Good Things in life aren't easily attained -- they are worked for. And the effort expended in trying to attain them is directly proportional to our intentions, in my opinion.
I'm not advocating game-playing. I'm saying that Pcola should REALLY BE skeptical at this point, he REALLY SHOULD think "I'm not sure how I feel about this right now." Anyone who's been stabbed before (and my wife has never cheated on me, but people tell me it's like you've been stabbed in the chest) SHOULD be understandably skeptical when their once-attacker now stands before you, asking to dance.