If you have a place to park part way, you could carry your bike on your car/truck and ride from there. If that works for you then you may find that as you gain fitness the total distance is less of a chore. Shorter commutes also give you more time to deal with issues, like flat tires, should they occur. Less sweat too, I suppose.

You said you don't want to change tires, but I don't know if that means you don't know how and don't want to learn or that you do know how and don't want to do it. If it's the former, then you could learn to change a tire in the comfort of your home before you get a flat out on the road and have to deal with it, which is a terrible time to learn.

I'm not sure what you have against changing clothes.