What does this actually mean?

A guy I just spent some time with, the weekend, went home, texted me he was missing me already and then called me straight away.
We texted and he says he had the best time and was very happy. He then texted ‘i can’t wait for the next step’ and a violin and firework emoji… we haven’t kissed or anything yet we just hung out.. what does it mean? What’s a violin emoji? Does he want the relationship to progress? Ta

What does this actually mean?
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