I feel numb and completely lost.

I (27M) been with my gf (26F) for 7 years. We're getting married in a month.

So for over 2 years now, I've been noticing that my gf has gotten a lot closer with her female cousin "Jen". They text practically daily.

My best friend's gf and my gf are in the same friend group. They went out for a girls night last night. My gf let it slip to her that she has been seeing an ex from back in her teenage years.

My best friend told me about it last night.

Turns out she saved his name on her phone as "Jen" and has been sneaking this shit under my nose and manipulating me.

I'm numb. I haven't even confronted her yet. Were getting married in a MONTH. Obviously this can't happen. but holy shit I am so overwhelmed.

Update:

I spoke with both sides of the family, and I've called off the wedding. I'm spending most of the day today calling vendors and cancelling things. I think keeping busy in this way is the only thing keeping me from breaking down tbh. Our parents are handling telling the families & friends.

I also confronted her. I waited till she was in the shower and took her phone to get absolute certainty about the texts with "Jen". This was the first and only time I've ever snooped through her phone, cause I've had absolute trust in her until now. She was literally fucking sexting him 2 nights ago. These texts go on for miles. I feel sick to my stomach thinking about it.

I'm sad. I'm angry. I'm heartbroken. I feel stupid. Betrayed. I've read almost all of your posts or DMs and I'll dive into some of the more detailed ones when things quiet down and when I inevitably get lonely and sad.

She wants to move forward with the wedding. She broke down in front of me when I confronted her with the texts. She said that we got together so young that she just wanted to explore some of her sexuality and freedom before the marriage. She swears that she made a pact with herself that it would end once we were married, and that this was just a phase. I really fucking want to believe her. I love her.

I can't do this. The foundation of our relationship; trust, safety, support, have all been shattered. I love her but I can't be with someone who has the capacity to do this to someone they love for YEARS and somehow justify it. I couldn't even imagine doing something like this to her.

I stayed at my brothers place last night I have 23 missed calls from her. I barely slept. Still feeling overwhelmed.

You have all helped me a lot, so I thought I'd take some time while having a coffee this morning to give you all an update. Many of you have been through similar things and have come out the other side. I can't thank you enough for your reminders to value myself, be strong, and believe that this will all work out for the better in the long-run.