Girlfriend just revealed she doesn’t care about my boundaries?

So I’ve been with my girlfriend for 4 months now and when we first started talking about boundaries she agreed with everything I had to say but she has been ignoring them every now and then and last night she revealed she only agreed with them to be smart, she never cared about them, to give you an idea she lied to me a few times about a guy who was a friend, she said there was no attraction or flirting but later it came out that there was and he was in a relationship she knew about, in order to try and gain a bit of trust back I wanted her to communicate more throughout the day, she can do whatever she wants but all I asked was that she let me know, yesterday she had a day off work and went to a friends, all good and well but when she said she was leaving she stayed longer so she says and didn’t communicate that, this is the smallest of the problems but with the buildup of her ignoring boundaries it became serious, she said she didn’t care about my boundaries and just said everything I wanted to hear to be smart

I don’t know what to do
Girlfriend just revealed she doesn’t care about my boundaries?
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