He hasn’t texted me back in three weeks?

He hasn’t texted me back in three weeks the last message he sent me was I want us to be together and make it work I replied saying I’m glad we are on the same page because I want to too. Then he never replied. We live in different states rn and he’s been active on social media I want to message him bc I miss him so much that I feel sick but I also don’t want to chase him what should I do bc I’m lost and sad
He hasn’t texted me back in three weeks?
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