Seth, if I am not wrong, these are the "friends" whom I told you
to meet less often right? (Or is it someone else here...?)

I believe you are now fuming and you feel you do not deserve all
these.
If you do not mind, let me tell you some things: Life is not
beautiful all the times. There are times where you will faced
difficult situations (like this one) and it is hard for us (third
parties) to assume who is right or wrong.
BUT nevermind who is right or wrong, just note what have you learnt
from this lesson. No its not that what they can do, you can return
the favour. NO that is simply just stooping to their level and I am
sure you would NOT want that. They have some issues regarding you
and they are using you to get what they wanted. Be it gals or some
form of fun or revenge.
What you have learnt is: if they can do such things, what more
fascinating stuffs can other people do? You may have difficulty
handling this issue (else you would NEVER post here for comments or
ideas) but this is a good chance for you to experience and the next
time you are in a similar situation, you know how to handle it
better even if you do NOT even like it.
I cannot tell you what to do for I have no rights or authority over
your actions. What I can do is only give you my perspective based
on what you have said. Normally if I witnessed both side of the
story, it will be clearer on how to handle this case. I only hear
your side of the story, that is why I am giving them a benefit of a
doubt. I apologise if I offended you in any way.
But normally things are not as serious as you assumed it to be if
you willing to look at this situation from an outsider's angle.
