It's a bit tricky when you only have one budgie. I have the same issue with mine at times, especially if I've been away a lot. If one person is home, maybe try to offer her special treats so she sees this time as a reward? When you're both out, give her special attention when you get home. I leave music on if I'm out during the day, and I always ensure there's light during the day as well. Seems to help a bit...