Of course he is.
Manny isn't worried about his image as a boxer as opposed to Mayweather who apparently said "You have congress, I have nothing but boxing, what if I lose?". That sentence is completely telling. This fight needs to happen for boxing, it should have happened a couple of years ago when they were in their primes (leading to re-matches and what coould have been a money-spinning series of top boxing), but the persistance of everyone wanting this fight will eventually make it happen and Mayweather is holding out for as long as he can.