Planning to meet a guy, but need advice.

So if you refer to my last post I asked about the age gap. He's 30, I'm 18. We have so much in common. However, whenever I think about meeting him, my heart starts beating very hard. I really want to, but I don't want to be murdered either.Am I being too paranoid? What are the signs I should look out for to make sure he's legit?Thanks for any help. :)