Yeah, and we wouldn’t say the same if your local zookeeper was asking you to take giraffes for a ride cos you have a sunroof. It’s a totally different situation!
Susan is supposedly a good enough friend for you to spend 1.5 hours watching TV with every Fri and Sat.
Yet, not a good enough friend that you want to spend any extra time with her in the car:
“I just want to go home, not drape 2 miles up back roads to her house and back down at the end of the night.”
When I drop friends home, we carry on the chat, often end up parked up outside their house still chatting!
This is hardly any extra time at all, so I think that if you originally offered / agreed to collect her, she just fairly assumed that was a permanent offer. For such a small amount of time, half of which is spent with a supposed friend, I think it’s fine if she didn’t realise it was going to become a big deal for you. If my friend was constantly re-thanking me, I’d get annoyed and tell her to hush!
If your illness means it’s too tiring to extend the evening to include her, reduce the time at Jane’s.
If you can’t afford the extra petrol money - tell her. Or speak to Jane as well and say you need to do the fuel cost instead of bringing Jane chocolate 2x a week! Jane isn’t really hosting anything, is she? In fact, Jane has it easiest so definitely doesn’t need to be brought chocolate twice a week if you can’t afford it!
Or just stop going and meet another way with Jane, because it doesn’t seem as if you actually like Susan 🤷🏻♀️