The pair are going through a tough time in their relationship, and it is said the former cricketer's failure to commit to tying the knot is behind their split.
A source told The Sun on Sunday newspaper: "She kept pushing for a date but he was happy as things stood.
"She ended it furiously. She started to question whether Shane had any intention of marrying her.
"She feels let down. They had big, big plans. She really thought she had found 'the one' in Shane. He could have easily saved the relationship by agreeing to a definite date."
Not the end yet
Liz is said to be "devastated" by the way their relationship has headed because marriage certainly seemed to be in their future.
A friend explained: "She is devastated about the way things stand as she feels she has invested a lot in their relationship which was, until recently, heading towards the ultimate goal of marriage."
However Shane - who took to Twitter last week to deny a split but confirm they are having problems - is refusing to give up on their romance, and close friends are hoping he will "see sense".
An insider added: "Don't write it off completely yet. There's definitely a lot of love there and maybe Shane will see sense."
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