Look into a travel group at a senior center.
I have the same issue but not as bad. My wife will still travel just not to everywhere I want to go. I have got her to appreciate flying on military cargo planes instead of commercial airlines (lots of room and generally better seats but you need noise cancelling headphones :)
I tried RV solo travel and the fact is I cannot have real fun without some one to have fun with. I cannot see sharing a RV with some other old duffer but I can see being in a group traveling to the same places and having fun doing it.