ALL THAT IS, ALL THAT WAS, ALL THAT EVER COULD BE!
Donna looked on from the distance, just watching the happily reunited couple! Over the time she had known the Doctor, she had begun to realise just how much this human girl named Rose meant to him! She knew from the moment he mentioned her, with that heartbroken look in his eyes, that when it came to the woman he loved, he would not be messed with! Nothing or no one could not come between them two. Not even the legendary Captain Jack Harkness! Though he had tried! Not just with Rose, he had flirted with niether!
She had heard Martha had had a crush on him, but apparently, she never even splinted the casing of his hearts! Thats why Martha had left! She had told the Doctor that she was leaving to look after her family. But Donna knew the truth! Call it girls intuition! Martha had left, because she couldn't bear been in love with a man, who would/could never love her back! She would just never let him know that!
What did she feel for him? She had often wondered that. He's an handsome man! There's no denying that! But, she's not his type, what would a great man like him, see in a earthling like her? Not when he had such beauties as Miss Rose Tyler! Don't get her wrong, she had nothing against Rose! And she had no feelings for the Doctor in that way! But she never thought it right that one is judged on one's looks! She also knew that the Doctor was not with Rose just for her looks. She knew full well that he loved her for her humanity, and self doubt, and everything about her! She wasn't jealous! Why would she be jealous? Him and Rose were meant for great things, and who was she to stand in their way?