I still have gifts from my first boyfriend. I don't think you have to throw anything away because they are a gift. When you get married it may be an issue because your husband may disagree with the kind of gifts they are, but a gift is a gift.
In a marriage, you'll be required to throw away gifts, pictures, and other memorabilia from past relationships.
If your still single and mingling. Gifts are fine. You never know who you'll end up with.