Student or Learner
Is there a subtle difference between "1" and "2"?
A: Where are you going?
B: To the store.
A: 1. I'm going with you./2. I'm coming with you.
Virtually none. The first might be slightly more likely if the speaker intends only to accompany the addressee on the journey to the shop, while the second is slightly more likely if, in addition, (s)he intends to remain there, say, to attend some event.