Is it too late now to say sorry?
Coming back from a bad rep that you – eek – kinda created yourself is different from one where someone’s out to ruin you for no reason. If you did something kinda shady, like kiss your best mate’s boyfriend at a party or spread lies about someone and got found out, the next step to fixing your rep is owning your mistakes. Apologise to the people you need to apologise to – ideally in person but, if that’s not possible, a written letter or email is a good way to express your feels. Make it honest and heartfelt. They may not forgive you, but recognising you were in the wrong and reaching out shows you’re serious about doing better.