I just got back from my annual X-Country trip (WI, MN, SD, WY, MT, ID WA, OR, CA and back). Normally I live for these trips. However this time it was different. My concentration isn't what is used to be and there were a couple of times I was ready to pull out into the road (after looking both ways, several times) and almost pulled in front of an 18 wheeler I didn't see. My mind isn't what it used to be. After thinking about this for several days in the saddle I decided the Almighty is telling me to call it quits while I still can. My bike is listed on Cyletrader but if you are interested, PM me and I will give a FJRowners.com discount.
I don't mean to be patriarchal and dismiss your awareness of yourself. But I have experience something similar in long trips...mostly due to NOT following the advice given to me by a heavy duty touring windinger who once told me: No matter what you do, always get off the bike about every hour--even if it is to walk around the bike and get back on it.
The reason being is that the road can have a hypnotic effect on you, especially after several days of riding.
another good advice is to ride for about 5 days and then take a day off...5 days give or take a couple depending on your personal resistance to the wind and noise effecting your physical and mental stages. Its good to visit someone and hang out their place, or simply stay in a motel a day, take in a movie--do something else.
It is commendable to wear a good set of ear plugs to block as much wind noise as possible. It is clear in research that noise causes your brain to react in 'flight' response and thus causes a great deal of fatigue. Noise on a motorcycle = fatigue.
There is also the factor of burnt-out. Anyone can burn-out doing anything, even stuff you like. So, this one year you burned-out, it might not necesseraly mean the good Lord wants to spend your Summers watching Sesame Street with your grandkids. It could be that you just burnt-out early this one Summer.
Anyway, good luck in your decision. God bless you.