Possible Clues:

• Endure
• Stay in a certain place
• Remain or stay (poetically)
• Tolerate, quaintly
• Wife-to-be, ignoring second letter, will do this with her time instead
• ___ your time (wait patiently)
• Stay with sweetheart following proposal
• Endure sweetheart holding up proposal
• Hold tight
• Remain US President without end