They more than likely have already re-seeded themselves and will pop up again the following spring. They are pretty easy to get started from seeds, too.

Since yours is potted however, you can overwinter it indoors. If you want to bring it in, you can cut them back halfway or so, making sure to leave enough leaves for the plant to stay viable.

Try to keep it on the humid side, by misting regularly and doing the trick of adding gravel, rocks, shards etc. to a planting tray and then set the pot on TOP of the gravel. The drainage water won't touch the soil and the water evap. will increase humidity quite a bit.