Jewelry étiquette

So what's the deal with jewelry from your ex? I mean obviously rings are a big no no, because there's a special societal meaning behind rings, but what about other stuff? I don't own a lot of jewelry and I'm one of those people that if I have to put something on and take it off a lot of times a day, sooner or later I will stop putting it on at all. And I don't really care about jewelry all that much, but I like to have a necklace and earrings on, and sometimes I wear a ring. But I ware the same thing, I don't change often.

For my 28th birthday my ex got me a necklace with a heart pendant, which I love. It's small, it's simple and I wore it for every day for about 4 years straight. At some point it did mean that we loved each other. After the break up, and especially lately, I've felt weird wearing it. If I wear it, it doesn't give out any secret meaning of me wanting her back, does it? Because I like it, and I'd like to wear it, but when I start dating I don't want her to think I'm stuck on the ex. 

I also have another necklace she gave me, with a cat pendant. I actually had to think about when and where I got it from, and it definitely does not spell love. Except my love for cats. But it still is from her. And the earrings she gave me are the nicest I've got and I wore them for the longest time as well. I guess it's not a problem now, but what about later? I really don't wanna go jewelry shopping, it's such a hassle.

Help?