This guy on social media I’ve never met keeps messaging me and asking to meet up but I feel uncomfortable. What should I do?

We’ve never met in person. Just met on a dating app when I was on one like a few months ago. I don't know how he found me.
If I block him will he get aggressive? I just respond to him but never reach out or anything. He’s asked me out multiple times and I never responded to those advances so he won’t give up.
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+1 y
Also he’s weird and keeps saying things in German to me. He said he is from Germany but he’s obviously not. For reference I’m very German so I don't know if it’s because of that.
This guy on social media I’ve never met keeps messaging me and asking to meet up but I feel uncomfortable. What should I do?
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