At the end of ch.44, after Darcy and Georgiana's visit to the inn, it says that "the evening...was not long enough to determine [Elizabeth's] feelings towards one in that mansion [Pemberley]," and that she "lay awake two whole hours endeavouring to make them out". Notice she's not trying to come to grips with her love for Darcy, but still trying to figure out how she feels about him.

Later on it says: "She respected, she esteemed, she was grateful to him, she felt a real interest in his welfare; and she only wanted to know how far she wished that welfare to depend upon herself, and how far it would be for the happiness of both that she should employ the power, which her fancy told her she still possessed, of bringing on the renewal of his addresses." These are all still fairly lukewarm adjectives, and she is still trying to decide whether they would be happy together if she agreed to marry him - not the attitude of a woman secretly in love, IMO! Her attitude towards Darcy is changing, but it's not the real thing yet!