Formal/Poetic:
* "Ayez mon cœur à jamais." This is a literal translation and quite formal. It would sound more natural in written form, perhaps in a poem or letter.
* "Mon cœur vous appartient éternellement." This means "My heart belongs to you eternally." It is poetic and emphasizes the belonging aspect.
More Casual/Romantic:
* "Je t'aime pour toujours." This means "I love you forever." It's a strong declaration of love and suitable for a close relationship.
* "Tu as mon cœur pour toujours." This translates to "You have my heart forever." It's a bit more direct and romantic than the previous options.
* "Mon cœur est à toi à jamais." This means "My heart is yours forever." It conveys a sense of ownership and dedication.
Important Note: The best choice depends on the context and the tone you want to convey. Consider the person you are speaking to and the level of formality of the situation.