Respark the Fire
Joanna does bring up a good point that I had not thought of before. If she is bored, then you need to make the conversation interesting again. Hit her with a topic she isn't expecting. More importantly, try to entertain yourself while doing it. Nothing helps more to move conversation along and keep it worthwhile than by having a good time yourself.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X