why do people think that messing round with their buddies is boxing? It's controlled brawling. Boxing is a skill not some hormone fueled kids beating each other off up.
If you are serious about BOXING get to a gym and I'll offer what advice I can from what I've done, tried, seen etc but I really can't condone these backyard warriors anymore!

BTW experience can overcome your confidence in being fitter once he lands on your face