To some extent, the safe can be said to be eternal love. This is because safes are usually used to store valuables, such as jewelry, cash, important documents and so on. These items may have important emotional value and represent eternal love. However, the main function of the safe is to provide security and protection, so the more commonly used words may be "safe", "reliable" or "durable" when describing the safe.

Of course, if you want to connect the safe with your eternal love, that's fine. You can regard the safe as a symbol, representing your treasure and protection of precious things and your commitment to eternal love.