Radio silence on whatsapp?

I met this cute guy in London and we both exchanged numbers. Later on my whatsapp stops working and I couldn't talk with him. Several days later, I got it working again, but my friends and I left London to go back to Spain.

I wanted to hang out with him as he seemed cool, but I don't know if he wants to. I did not mention that my whatsapp was out of commission, although we've been texting on and off. The last time I texted him, he didn't reply, and that was last Wednesday. So should I move on and forget about it? The only thing that confuses me is that we do talk, he'll ask another question to keep the conversation going.
Radio silence on whatsapp?
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