I ran across the same thing when my GF was riding with me 2-up. Really depends on the passengers weight, the more she weighs the harder it is to balance the weight. Don't know what your situation is, however, my GF is now riding her own bike.

 

This is the only possible relevant factor I can think of. My wife hits the scale at 112 so I barely notice her on the bike plus she knows not to be moving around. As far as the weight of the TP, don't get it. I have a detachable for the Road King and don't notice anything taking it off or putting it on. Perhaps it is just a mental thing OP has to overcome? Best of luck. Not going to write a book here on what should and should not be done with a passenger as I would usually give the average rider the benefit of the doubt regarding common sense.

 

You do understand the weight thing is mostly in your head, not that big a difference.
Two things to look at that will give you much better control a low speeds.
Extended rear brake pedal. It drops the angle gives you better control a low speed.
Adjustable clutch lever. It allows you to bring the engagement point in closer, again improving low speed control.
I ride a 2017 RGU and I am 1 inch shorter and lighter than you are.

 

It's pretty common with the weight of the fairing mounted to the forks.

 

Listen to this guy!

 

I use both front and rear brakes but will try just the rear when coming to a stop. I do think a lot is in my head. Need more miles now. Thanks to all for the feedback. Now to get back out there.....

 

this..too soft *** end squats making front end lighter and it wanders...try maxing out the preload before next ride, bet you notice a big difference..then adjust accordingly after that

 

Riding two up for the first time can be hairy its just takes practice like everything else. Just keep riding get use to the bike yourself. Like mentioned my others set up shocks for the right load and go for it Enjoy Ride a Lot Ride Safe.

 

having 150ish lbs on top of the bike suddenly changes the center of gravity. Just keep riding with her, you'll get the hang of it. I always gotta pause for a sec and kinda re learn how to stop when my wife jumps on my bike, once you get used to riding solo all the time and you throw another adult on the bike your brain has to reset.

 

All the advice here is good. I have been riding with the wife for 38 years, she is six inches taller and a few pounds heavier (she doesn't read this, but why chance it?).
She "chair dances" going down the highway, but on the city streets I can barely tell she's there.
Practice makes perfect. I use the rear brake for the last few feet of a routine stop, and although it's been many years since I've had too, remind the passenger to pay attention.
If I lean, you lean. If I fall, you fall. We're in this together.