Marijuana isn't physically addictive, only if you fall in deep love with it will you get mentally addicted just like with anything. Weed isn't lame, it's not cool, it's just a plant that makes you feel good so if anyone thinks they're cool from smoking it they are stupid asses. Now stop being a brainwashed soldier of the government and go learn more about it and why it became illegal sometime. Hell, just watch The Union.
To the OP:
If you don't feel like giving in to peer pressure tell your friend to give you some, enough for 1 or 2 hits, then take it home and decide for yourself if you want to smoke it.