if I have a newish gas powered car, that took a lot of resources to build, am I really saving the environment by buying a new EV, which will cost even more resources?
There have been a bunch of studies on this over the years, with different conclusions depending on the bounds of the question. For example, does the car you get rid of actually leave the market, are you replacing a beater or a decent car, what sort of car is replacing it (hybrid, plug-in hybrid, standard range EV, long range EV). I think (without double checking the actual studies) that the answer is that if you replace an ICE car with a standard range EV, and keep it for like 10 years, you are better off.
The shame is that the studies always force a particular perspective onto the question: should you replace one car with another? I would bet that the best solution is to keep the ICE car, but get an electric motorcycle or moped, and use that for every situation possible, and save the ICE car for rare situations that actually need the range or size.
EV manufacturers love to promote their vehicles as "better for the environment", but they are really only "better" than ICE cars.
The unfortunate thing in your case is that apparently motorcycles are worse than cars in terms of emissions. Yes, the fuel efficiency is higher, but cars have better combustion and catalytic converters, so they produce less of the really potent greenhouse gases than motorcycles. I only learned that recently.