Ok everyone play nice please. Tone and intention can get lost in the written word. Unfortunaltely this is a hard topic for a lot of the board to get their minds around. Poly people (for the most part) really don't understand the loss of connetion that you feel Mono, it's beyond their experience of love and relationships. We tend to think that everyone experiences the world and emotions as we do.
This is a scary place for you to be. There is a risk that even with pulling back that you will lose the connection that you have with RP. Will it be a permanent loss of connection? Only time will tell for sure. Is it worth it for either of you right now? Only the two of you can make that desision. RP has said that right now the risk of losing that connection with you isn't worth proceding to a physical relationship with Leo. Down the line that could change. It's good that you're asking these questions now though. Sometimes it takes a lot of talking about the same thing over and over (and over and over and over) again to work out what the best desision you can make with the information you have available to you. There is no perfect solution.
Everything will be ok in the end. If it's not ok it's not the end.