When the chocolate is tempered, you drizzle it all over the balloon. Freeze it in a cake pan, then when it's frozen you cut it into sticks, and you can then put that in a glass of champagne. You know, chocolate is one of the things that goes really well with romance. To impress her, you can work on the presentation, perhaps. Chocolate tarts are really a good dessert, and that's something you can share together.
Sharing is important.
When it comes out dry, the cake is done. Usually we just touch it and judge the texture, but if you don't bake that often and don't have something to refer to, you'll have to go into the cake and test it that way. My cheesecakes fall after baking. I let them rest in the oven until they cool completely. They rise nicely while baking, but fall while they cool in the oven.