That's a topic to discuss with your oncologist, but since you asked specifically, I'll do my best to answer from my limited understanding as a layperson.

Yes, I'm very sorry, but I think you still have cancer. If they detected it in a lymph node, it's gone past stage 1, so it will likely never disappear from your body (barring future medical techniques and discoveries). Still, you may be able to keep in in check indefinitely until you die of old age, which is the next best thing.

The important questions to ask your oncologist now are how likely is it to continue spreading and how fast might that happen? You also need to ask yourself whether you prefer to err on the side of over-treatment (Damn the side effects! Full speed ahead!) or under-treatment (let's just wait and see what happens). The oncologist will keep your preference in mind while designing a treatment plan.