Dear Sir
I cannot say anything about criminal legal consequences but one may have civil legal consequences. Generally engagement is treated as agreement to marry in future. If you never engaged, you need not worry. But if you engaged with someone to marry, you should know that you are in a binding contract.
According to section 65 of Indian Contract Act any person who has received any advantage under such agreement or contract is bound to restore it, or to make compensation for it to the person from whom he received it. So, if you got any valuable gifts, engagement ring, or money, you must return it to avoid a suit by the other party entitled to claim in the Court of law.
According to section 73 of ICA, “when a contract has been broken, the party who suffers by such breach is entitled to receive, from the party who has broken the contract, compensation for any loss or damage caused to him thereby, which naturally arose in the usual course of things from such breach, or which the parties knew, when they made the contract, to be likely to result from the breach of it.
Such compensation is not to be given for any remote and indirect loss or damage sustained by reason of the breach…”
If the other party made arrangements for booking a club or hall or bought required goods for the purpose of engagement or marriage or both, the other party may sue you to recover compensation for such loss or damage.