How long would you wait?

I drove my boyfriend 40 mins away to his friends house so he could drop something off at his house. I only had 2 hrs of sleep last night and haven’t eaten all day (it’s 10pm where I am). My boyfriend said he and his friend had to wrap up the thing he’s dropping off. The annoying part is that I was already in this area around 2pm today, and my bf was supposed to come with me so we could do this then but he didn’t wake up after I tried to wake him for 2 hours. Also this is my car & gas and he knows how long I’ve been awake and hungry. He said he’d only be 10 minutes inside his friends house but I’ve been sitting outside his house in my car in the driveway for 20 minutes now. I texted him asking if he could please come out now because I want to make it to chipotle before they close but he hasn’t texted me back. How long would you wait here before leaving him at his friends house?