<human>: Could you distill the essence of the text into 1-3 sentences?

Basically I met this person online. We started as pen pals, became text buddies, that quickly became potential romantic interest. Both of us planned on meeting up sometime in the near future, and so for my birthday he sent me an expensive necklace, an AMC gift card, and a coffee mug.

Soon after that though this person began to violate my privacy and managed to become controlling despite us never having met. Eventually I terminated any contact between us, although he has continued to try to reach me through text or email.

I do not feel comfortable having these items in my possession. I do not want them, they are a reminder of someone who is incredibly unpleasant to deal with, but at the same time they make me feel guilty or even beholden to him for having spent so much money on me. I don't like that feeling of obligation. I'd send them back, but that might encourage his attempts to contact me. So what should I do with them?
<bot>: Received an expensive birthday gift from a potential love interest that turned out to be a jerk, I don't know what to do with them.