2. That you’re still using a present from your ex.
Finding this out is guaranteed to be a blow to his ego. One comment was, “He found out that the watch I wear was from my ex, and it instantly and totally killed the mood,” so be aware that you can be exposed at any moment. Some presents are hard to give up, but when you consider the risk, it’s probably better to go through the pain of throwing them away than the pain of having your boyfriend find out.