My fiancé (bf of 9years) was invited to a short-noticed wedding without me. He will be a secondary sponsor. The couple getting married are also friends with this certain girl, and will be inviting her to the wedding too, who used to like my fiancé about 2 years ago while they still used to work together. Though my fiancé has always denied anything between them, I have always felt there was something going on. I've caught them texting each other at 2AM YEARS AGO and have hidden it from me, and more. She has been a big issue between us, and though he hasn't had any connection with her recently, I can't shake the feeling she will make a move when they see each other again. For years, we have been smooth sailing with no 3rd party problems. My fiancé has always been found "too nice" by many people. He isn't the type who'd ignore that girl if she says hi, nor will he not attend just the wedding just because of her.