Do I like him? Is this a crush?

When I see him unexpectantly coming around a corner, I get buttefrflies. When we touch hands, I get butterflies as well. When he walks by i dont always get butterflies, they go away when I stop hanging out with him. When I hang out with him more and more outside I get more butterflies. Even when I stop hanging out and I think about him a lot, I start blushing and smiling a lot when I see him outside. is this hormones? I should also add, "butterflies" go and come back at random times. So weird. Just when they leave for some time I think I'm over hiom but then BAM they come back. What does this mean?