Katie,

We all make mistakes.  I look at the person to see if they recognize that they made one, that they own up to it, and that they make reparations about it.  For the most part, people do not deliberately and consciously do bad things.

Look at who you are.  What are your core values?  Do you value Gabi as a person and as a friend?  If you value friendship, loyalty, and honesty?  Gabi did nothing wrong to you.  You and your friends are judging her.  You know that bible saying, He who without sin cast the first stone?

If you do decide to get back together with her, you may want to ask her about what the others said about what she might have said about you behind your back.

It IS hard to go against the crowd especially if one is your boyfriend.  Walking your talk (integrity, kindness, friendship, etc.) is hard.  Standing up for what you believe in when faced with the consequences of the loss of your circle of friends is daunting.  This is a good test for yourself in seeing what you truly believe in despite what others think.  This is what courage means.

Mark