People can have married boyfriends.
People can have controlling boyfriends.
People can have stingy boyfriends.
People often exaggerate when telling stories.

But can a person who is old enough to have adult children ride a too big mountain bike 50 miles when riding only four days a month? Can they ride their 35 pound "big tire" bike 73 miles in five hours? If nothing else, the OP has a tough rear end.

Socaljewel (if you are for real), you said that you would not bike on your own. You mentioned the boring mountainbike trail. Maybe biking isn't for you. Maybe you are a runner.