Seems he’s willing to stay Catholic. His sin was falling in love with another human being not, falling out of love with Christ.
If one is not willing to abide by the teachings of the Catholic Church then by one's actions, one excommunicate one's self.
He clearly cannot possibly believe in the True Presence.
Very well...
I see no sin in “Falling in Love” with another person
The Sin was in being unfaithful to the
Oath he freely entered into,
without revoking the Oath first.
I know all too well the consequences
of a binding Oath
And the damage incurred by Faithlessness