Is it ok to call off a date because he keeps calling and texting too much?

Even though he's an ok guy whom I've met 2 months ago and our 1st date went good, the next days I got 3-5 missed calls and a text message every single hour.

I've explained to him my working hours and he knows what days I'm busy. He called me during my working hours. He's being pushy that I've now lost interest in him. I feel as if part of my space isn't being respected. Plus he knows I'm family oriented and that sometimes I like spending time with my grandma and relatives too.

I was thinking of telling him my reason why I'm now not interested anymore. Is it ok to call off a date for that reason?

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Thank you all for replying. We spoke about it 30-35 minutes ago. He apologized, said he'll respect my hours from now on and let him know when I'm available. I liked the way he asked for another shot so ok I'm giving him another chance.
Is it ok to call off a date because he keeps calling and texting too much?
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