think this matter depends on your personal opinion. If you want to save this relationship, I think you can take this opportunity to express your feelings. You can give some warm little things to bring back your sweet memories. For example, make a beautiful album of your old photos, give a bouquet of flowers, or give a love lock or music box engraved with your two names. Girls are often moved by these things.
If the OP just wants to get along with the other party as friends, then you should also give a gift to express your blessings. The OP should not be entangled in this. But since you are just friends, not lovers anymore. Don't give the other party anything that makes her feel ambiguous, and don't give her something you have given before. You can choose something more solemn and generous, such as a record of her favorite singer, a book, a very beautiful card, etc.
In short, the OP should first clarify his or her heart and then make a decision.