I go in just inside the door, hand still on knob, and very sternly say 'Finley lie down, it's sleepy time, time to rest your head, mummy will see you soon' I don't even do PD because it's silly with a nearly 35 pound kid. He's a kid now, not a baby, I hate to admit it but it's true really!
And that's it, then we let him cry. He does get upset but he also knows by now that we aren't going back in there. When the hour is up we will go and get him and just bring him down and act like it's all cool. There's no point in lecturing or getting upset - we can't make him sleep. He knows what he's doing but we are firm that he has to be in there for the hour - sleep or not sleep.
If he's teething, ill or whatever then we don't. We will do whatever we need to, rock him which almost never works, shush/pat again never works really or drive if we have to, which for us means driving well over an hour most times just to get him to sleep in the first place Well you girls remember our 250 km day lol
But on a normal day routine prevails and I will just persevere.
But if you can't do it and be confident about it then you shouldn't - 'tis true. Please know that you are not breaking any bonds, it's about parenting and we have to make some really tough choices in the best interests of our kids. Not easy.
I am not sure what else to suggest really, you aren't getting a break this way either. Maybe someone has some better tips of how to fix this! (((hugs)))