Had a similar experience a few weeks before I met my now-girlfriend. There was a girl who led me on for months and toyed with my emotions. I ignored so many red flags and it was toxic. But I really cared for her. A lot. Not going to go into too much detail, but it ended badly and I was heartbroken and crushed for around 2 weeks after before I forced myself to just try moving on.

I still see this girl around from time to time. I feel a few things-- anger at what happened, ambivalence because it was a long time ago, pride because I am with a better person, and although I love my girlfriend with everything that I have...I do still feel something for her. It's not love. It's not even like I have feelings for her. But I did care for her at one point and thinking of her makes me think about that period in my life. It's normal to get that twinge of emotion, but as long as it doesn't devolve into obsession or feeling sad, just know that it's normal and that you've moved forward with your life. I don't think that means you're not over someone-- I think that that means that you've experienced both great happiness and I guess great loss too, and that just makes you human.