Does anyone know what this means?!

Today I asked one of my friends out. He was about to leave a talent show audition at our school and I flat out asked him. I've been wanting to for a while but I was scared too. I finally asked him out and he said "I'll get back to you on Monday" I don't know if that's a no. My friends tell me it's a no. I don't know if it is and also when I asked him he gave me a weird look. Like not bad but more like he was surprised. I don't know if I can wait 5 days to find out what his answer is but I don't know how to ask him without sounding pushy. Any suggestions?