I'm always the one who writes first. Should I stop?

If you are always starting, initiation is not being shared. That can feel one-sided even when replies are warm. It does not by itself show whether the cause is habit, expectation or a difference in interest.

You can ask for more shared effort, or stop initiating because you want a break. Turning that break into a secret test adds a conclusion the silence cannot reliably provide; a direct conversation makes your expectation clearer.