The trust with your girlfriend is ruptured and hasn’t been repaired. You walking around feeling like you can’t talk to her about her behaviors isn’t healthy for either of you. The lack of trust in her is a direct result of her behaviors. If it isn’t addressed, she will continue. You will continue to be resentful, and the long-term relationship will suffer.
I highly recommend a couples therapist to help you sort through these issues. I think going sooner rather than later to get this on the table is the way to go.