You’d never ghost a friend three times in a row. So why do you keep ghosting your own plans?

Commitments to other people carry a social cost and commitments to yourself do not, which is why the second kind gets cancelled without much thought. The effect adds up quietly. After enough cancellations, some part of you stops treating your own plans as real, and then making them starts to feel pointless.

Pick one thing you keep abandoning and do it once at the time you said, even briefly. Make it small enough that backing out would be absurd. You are rebuilding a track record, and a short honest one beats a long list of intentions.