Can a girls heart change in a matter of a day? 10 days? My ex told me that she loved me so much like a day before she wanted her space then broke up with me 3 days later. We hung out all weekend and things seemed perfect. Even 10 days if even before that she told me I was perfect for her and mentioned the future and when I propose to her how special she wanted me to make it! I guess I just don't get how a persons heart changes that fast I feel so lead on and let down!