Should I sell the jewelry my ex-boyfriend bought for me?

I know it's petty and quite sly, but I'd just like to start off with saying he cheated on me multiple times and then broke up with me to be with somebody he repeatedly told me was just a friend - and many mutual friends of ours have told me something happened with the two of them when we were together. Normally I'd keep it because of memories, but I truthfully do not want anything to do with him what so ever. I used to wear them 24/7 when we were together but since about a month after we broke up I took them off and didn't put them back on again. I asked if he wanted them back and he said no. Just not really sure what to do with them. It's a necklace and a pandora bracelet and charm.