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Communication is one of the most important things in a relationship and this is a real problem. If you don't agree this is a real problem then you're the problem. Texting your girlfriend is not that hard and it is not even high expectations. It's just basic decency.
He is communicating. He just not pleasing you because he doesn't start the conversation. That's very different to not communicating. One is a fundamental, one is your own preference.
I agree with this. Be upfront. If he doesn't wanna live up to your expectation, he might just ghost or fade away so be prepared. But be yourself.