Insofar as we've proved anything objectively, or anything in regards to our shared reality, I'm a physicalist. The laws of physics seem to determine, quite conclusively, everything, including mental states.

Insofar as my own subjective, singular, personal experience of being alive goes, I don't know. I'm sure I'm as susceptible to physical influence as anyone, but currently I struggle to imagine how we could physically measure what I currently experience as 'being alive', though I certainly couldn't assert it as impossible. I suspect that "don't know" is the definitively correct answer, but I'm not certain on that yet.