A: Anon, I hope you forgive me for the excessive questions I'm about to ask you, but I want to make sure that I tackle this situation appropriately. How long have you known this guy? Is there anything else that he's done that's been a little sketchy? Do you really like this guy, or are you looking for some romantic relief after your last ex? Granted, you can simply answer these questions for yourself and then go from there, because if you answer "not long" to the first and "yes" to the last two, you might wanna think about slowing it down and possibly moving on altogether.
To recap: a guy you started liking basically sent out a huge red flag by being incredibly late to pick you up without so much as a two-word text. That's EXACTLY what that was--a red flag. Has he explained exactly why that happened? It had better be something good.
To answer your main question, NO, you are not being ridiculous. And if your intuition is telling you to be on alert, there's a good chance that this guy is bad news. Slow things down a little and don't accept his proposal just yet. Hang out a little more and see how it goes. Remember, don't settle. Ever.
Let me know if you need more analysis or help. Best of luck!