What will happen if a cop took my fake ID but did not arrest me or tell me I was in trouble.

A cop believed I was drunk and asked to see my fake ID once I reluctantly told him I had one. He said he just wanted to look at it. At that point he put it in his pocket and said he would add it to his collection. He apologized to me but told me in good conscious that he could not give it back. He told me I was not in trouble and that he did not care if I was drinking, he just wanted me to be safe. He even told me he was not recording at the time. He also let a kid that even told him he was drunk ride off on a bike right before this altercation took place. I’m his exact words he said he didn’t see that and stopped shining his lights. I ended it by saying I’m sorry and he said seriously don’t worry you won’t get in trouble”3. So should I be worried about this or what?