Im getting it later today, i read the sticky of friends codes for it, does that mean you can play against your friends?

if they can connect to the internet yes

I thought it was really fun, but got boring after a few weeks of almost constant playing

haven't played in over 2 months

Yes, you can play online, and it is good though some people say melee is better (which it kind of is since in brawl they took out all strategy really) but it`s still a very good game.