How do you say forever my love in french language?

Answer 1

toujours mon amour, would literally mean always my love, but the french have a habit of using the positive (always) instead of the slightly negative (forever) as it flows better in their sentence structure (you would have to sat something like til the end of time my love, and always is equivalent to forever)

mon amour à jamais

mon amour pour toujours

Answer 2

"Pour toujours mon amour"