[...] My neighbor does not want to buy it and he claims that if I sell it I owe him an indemnity. Is right ?
Article L 411-1 of the Rural Code stipulates that "the making available for consideration of an immovable for agricultural use with a view to exploiting it" is subject to the status of tenancy.
Cases of land repossession by the lessor are exhaustively enumerated by law.
But if your neighbor has not paid you a single euro, he will find it difficult to enforce this status.