Heartbroken

I'm in a LDR. My girlfriend just started working in a new company and recently told me that she has met another guy and she's developing feelings for him. She tells me that she loves me so much and she just feels so confused right now. At my end, I feel so betrayed and heartbroken. I also feel so confused if I should just let go of her or keep holding on. I wish I could go back to sit down and talk with her but I can only do that at the end of next year after writing my final exams.