Solipsism requires everything to exist within your own mind. But you say that "any of us may not truly exist." Now if you said that "the only mind I know to exist is my own" and then to reject the existance of all others would be solipsistic.
However, you obviously doubt solipsism a bit, otherwise you would be suffering from solipsism syndrome and if you truly thought I didn't exist you would have no motivation to interact with me.
In the philosophical world solipsism is about as unpopular as nihilism. Not because it's falsified, because it's internally consistent and cannot be disproven, but because it undermines morality and: "Some philosophers hold the viewpoint that solipsism is entirely empty and without content. Like a 'faith' argument, it seems sterile, i.e., allows no further argument, nor can it be falsified."
well said
I look forward to more of this.