Well, Elizabeth could also have been desposed because of her husband, and actually I find this more likely. Had she made an unpopular foriegn marriage, that might have been the end for her. But, then she was well aware of it. As for Leicester, I think she may have wanted to marry him, but never really entertained the idea seriously. She was much too clever to marry anybody, even someone she deeply loved, such as him. Had she been in a less exalted position, I think she might have married him, though.