@JJG91,
How much do you love her? Are you wanting a permanent relationship with her?
Talk to her, let her know how you feel now and then ask yourself how you'd feel if she parted from you. Then ask yourself how you would feel if she, or a future girlfriend dumped you for similar actions?
If you truly love her, trust can be rebuilt, but, it takes time and not everybody can trust again. You need to ask yourself where you stand in this.
I wish you this best in this.