Go ask a Gadol Hador in Eretz Yisroel and let us know what he says and what he says on the whole idea of proposing which is something not according to Torah values.
Mazel Tov!
The kosel is a Makom Kadosh and abused in many ways with people using it as social hangout. Someone once pointed out to me that one was not even permitted to taked photos as the kosel, so we stopped.