Need of help

I have been seeing this guy which I really like. We been on three dates. It’s been going good. Then he’s been away to see family for a month (in another country). We have been messaging one and another for all the time. But now he’s stopped. I messaged him but he has read the message or message me back.

It’s been two days. I can see that he’s been on the WhatsApp as it show the last seen. But he’s still hasn’t read my message or replied. What’s happening? Is he ghosting me? Please help me.