If a guy you are talking to doesn't text for a week should I be concerned?

We used to be boyfriend/girlfriend and he claims to love me unconditionally. We decided after the breakup to not fully break up and he claimed to need more time It's been three solid months of flirting and everything seemed good but suddenly he is distant again. Now it's been about a week since I heard from him. Keep in mind he asked me not to move on and claims to see a future with me.
If a guy you are talking to doesn't text for a week should I be concerned?
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