I always wondered "wow, I wonder what it'll feel like"  and  "how do i know if its actually him kicking and not just butterflies?"

WOW!  trust me, you will know when it happens. My little guy is one heck of a nudger. Its mostly at night.. of course, when im trying to sleep! lol
I just love the feeling of knowing he's in there, healthy and strong . The best feeling in the world is feeling your baby for the first time.