I'll try to put it in a press
Keys do wear, my bike came with 1 key, the first thing 1 did was go down the street and have a spare made. If your want that OEM Honda look you can order a blank (uncut) key through a dealer for like $8. I suggest you have a spare key made by a good locksmith ASAP, before it gets any worse, for 2 reasons:
1. you said you only have one key, everybody needs a spare, I can think of a couple times I would've been SCREWED without a spare. One time I let a key wear so bad it broke in the ignition, luckily there was barely enough to get side cutters to grab, got a ride home and grabbed my SPARE KEY.
2. everybody loses a key at some point in their life, do you want to pay for a new cylinder then not have it match your trunk?
Spend the $2-$3, save a lot of hassle and maybe some $ later. other than that
to all the above suggestions, BTW,I also use graphite lube for locks.
P.S. Never caught any of your previous posts so