If you dont talk before the planned date do you assume its off?

i gave this guy my number and he texted me then it died off. so i double texted and we planned to hangout Sunday but not a specific time. its been nearly 3 days now and we haven't said anything to each other. do i assume its off and he doesn't want to see me? i feel like if i ask "hey what time were we thinking Sunday" is desperate. help

If you dont talk before the planned date do you assume its off?
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