Fear of accidentally flirting

I'm beginning to realize that the way I interact with people might be misinterpreted as flirting. I really have no gauge for what flirting is, so in theory I can't really avoid doing it by accident. The way my brain works, I easily get obsessed with things that I like, including people. I might follow them around or talk to them nonstop, and feel what normal people would consider an unnatural level of platonic fondness for them.

I hyperfixate on things to the point that it consumes my life. For example, if I like a tv show, I will only think about that tv show, only want to talk about it, and nearly everything else is uninteresting. I also get this way if a person fascinates me enough. I want to talk to them all the time, I fantasize about talking to them, I want to be around them. But the feelings are not romantic.

I am now painfully aware that people who are not asexual might interpret this as romantic interest. I'm afraid of them thinking that, especially if it weirds them out and makes them dislike me. Or if it unintentionally gives them the wrong idea and leads them on. To be honest, it makes me somewhat afraid of talking to non-asexual people of the opposite sex altogether. I wonder after conversations if I said anything that might give someone the wrong idea. It makes me wonder, also, can people sense that I am different Are they able to tell that I'm not trying to flirt with them? Am I really held to the same expectations as non-asexual people are? If so, that's what scares me.