I'm so growing up here!

For the last couple of days me and my brother has been home alone. Really alone, as in, no adult sleeping in the house, alone. Is it silly that I, even though I'm turning 18 in three months hasn't been home alone for that long? I went to the grocery store and bought today's dinner, (tacos!) and I cooked it! I've never bought dinner that *I* was going to make!