Join Date: Oct 2009
Location: Just south of sanity
Does the saddle fit you and the horse comfortably? Then it should be fine.
Do you feel as if you're no longer a confident rider? That would definitely affect how you perceive your riding abilities.
How big is your horse? How old? What breed? Does he appear to have difficulty carrying you, or again, is that just your own perception of yourself?
Bigger riders can and do ride lightly. If you've been trained properly, aren't plopping down on his back, using the reins to balance off his mouth, and he appears to be comfortable and able to carry you without difficulty, the extra weight probably isn't bothering him.