What would you do in my place?

So it's been getting a bit serious lately has it? And she's been a bit engaged lately has she? Sounds to me like no-one here is very serious about anything, least of all commitment. I realise that you're probably bowels-deep in heavy-hearted emotional turmoil, but I'd say everyone involved should fuck off for a little while on their own to get their heads straight.

Personally I feel bad for the groom. If I were engaged and found out my fiancee had been casually screwing a persistent old flame I'd want his blood.

I'm sorry however that you're having a rough time. In a similar situation I'd like to think I'd have manned up and offered an ultimatum: me or him. I can't help but think you'll feel like a totally rejected piece of shit if she goes through with the wedding. Have some self-respect and nip it in the bud now before it explodes in your face. Posting about this intense shit on a bike forum only highlights that you need to get GET A GRIP.

this is pretty much how i feel.