Am I in love or is it just lust?

So I started to talk with a guy a few months back and he turns me on a lot but it’s past that. I like the way we tease each other and he likes my defying comebacks. Once out of the blue he blocked me but he added me again a few days ago on my birthday and we started chatting again. I don’t seem to find anybody to have the same connection and vibe that I have with him but I really don’t want to be attached to a guy. We both have our jobs so we don’t speak all the time but when we do I enjoy it very much and I miss that message from him when he doesn’t talk to me. We have never seen each other in person because we live in different countries.
I currently don’t have frequent sex so maybe I’m just eager for his touch and it’s just lust?
Am I in love or is it just lust?
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