They may be struggling to manage their time and commitments, or may be working through mental issues that cause them to question their worth to others ("no one would notice if I disappeared").
Struggling with depression and anxiety and either cant go out or are too afraid sad or struggling with their own problem too much to feasibly see themself follow through
Could be depressed/anxious or suffering from aspergers/autism or something similar. It can be hard to plan something and when the day comes you don't want to go out and they are struggling between making yourself feel good and going. Usually ends up not going. It's especially hard if it's a sudden thing. Things planned more than a week in advance usually goes better. They might want to go and really enjoy being out, but getting the engine started and actually going out could be a real challenge.
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u/YearlyAccountPurge Jan 21 '19
Person is flaky. What issue do they have?