<human>: Give me a shortened version of the text

Sunday my fiancée left me saying she is unhappy with our relationship and doesn't think it can be fixed. She says we have the same problems over and over again and they never get fixed. I haven't always been the best partner in terms of support but I want to change.  I've told her that and how I feel about her but she thinks I'm only saying these things because she left. I have taken her for granted and fear it may be too late. Over the past few days I've tried talking to her and telling her how I feel about her and how I want to fix our relationship given the chance but it doesn't work. I've been devastated. I've been missing work because I feel like half of me is missing. I also worry about our daughter growing up without her mom and dad together. What can I do to fix this?
<bot>: I'm trying to fix my relationship of 8 years since my fiancée left but nothing seems to work. I need some advice.