My girlfriend has been cheating on me

Throwaway account. <br><br>I (m35) found out my girlfriend (f33) has been cheating on me. It's been 2 months since I found out via a text message and I've been absolutely devastated. <br><br>We've talked and she says she's sorry and is willing to do whatever it takes to make it right but I just don't know if I'm ready to forgive her. The trust is gone at this point. <br><br>Things were great between us. We've been together for over 3 years and even have a child together (10 months old). That's what hurts so much is that she was cheating while pregnant with our child. <br><br>I've been trying to pretend everything is fine but it's not. I don't know what to do. I've considered leaving but at the same time I have a child with her and don't want to break up a family. I don't know what to do. <br><br>Does anyone have any advice on what I should do?