Why do teens go under the influence of peer pressure?

Because, we think our friends won't respect us or accept us anymore as we are.

yeah and being a teen is more confusing than it is and we always want someone to need us or maybe someone to look up to so what ever comes up we have to follow

I agree^

People inflict pressure on us, because if we don't do what everyone else thinks we SHOULD do then we are considered as being DIFFERENT?

If your being put under pressure the best thing to do is not to listen to it, even though its hard, because all you need to do is be yourself, and good friends love you for who you are and not what you "do".