Stuck/slow fermenting cider

[vtbrewer]

I apologize if this has been asked before, but I am brewing my first batch and I'm not sure if I did something wrong. I basically used the default cider recipe from the instructions, adding 2 cups of sugar and filling the bottle 90% with apple juice (I was hoping for a stronger, dryer cider). However, after 10 days fermenting in my pantry at ~72F, i don't see any bubbles rising anymore (there were modest amounts earlier), but when I taste it, its still sickly sweet. Am I being too impatient? Should I add more yeast? Is there something I'm missing?

Thanks!