Thinking of going "One bike".

I know this is an idea that is so foreign to most of us here but I am thinking of selling my second bike and just having and obviously ride just the one. I have found such a difference in my two that I have to talk myself into riding my older bike and regret it after just a few miles. I have gone so far as to come home from a ride and then take out my new bike and just ride around the block before showering up and a cold drink. I guess I could regret this if the one bike has an issue and I can't ride for a while but I hate to just keep a second bike around in case something happens but that currently would be it's reason for it's existence. The other idea is to make it a work in progress and put on wider tires and use it more as a gravel/dirt trail bike. At this time they both occupy the same lane as to their purpose but the newer bike is so much better. I have gone so far as to test ride other brands but, for the same reason that I did not go with a different brand when I test rode them in the first place, just don't fit as well as the bike I have. Can't ride a road bike so I have my limits as to what I can ride. Was looking at a used carbon road Trek but it was an older bike with a too aggressive geometry for me at this point of my life.
Just thinking out loud but I am not going to dump the second bike until I am sure it is the right thing to do for me. Not really sure of what I am asking but would appreciate your feedback and ideas if you feel the urge.
Be safe all, Frank.