All of us are familiar with the first two and usually with some anxiety or resistance attached.
What distinguishes them are two primary states of being:
First, in order for a commitment never to devolve into an obligation, all of our aspect need to have been present and in relative agreement at the time we made it.
Very hard to do when we all have so many divergent wishes, fears and intentions.
Secondly , a commitment must be renewed daily, if not constantly, to prevent new and changing life circumstances from inviting more and differing desires and goals from degrading it to obligation.
Good News: Transformation back to commitment grows directly from either forgiveness or acceptance of self and other. It automatically brings an increase in self-worth and belonging as well, and we are all capable of these choices if our present time selves want them enough.