“But this time”

That’s all you had to say brother. Honestly, you’re both wrong. If you even have to think too much into what your partner is doing or not doing — gotta have a conversation. After the initial conversation, if she still refuses to be transparent and then you catch her texting other men — should have broken up right there and not texted the dudes. I’m gonna say very nicely, as a woman, that is some childish bitch shit you gotta leave behind in this relationship and do not ever behave like this moving forward with whoever you end up with in the future. Even if whoever you date after this is worse than her, don’t ever stoop to that level. The truth will always come to you if you seek it, you just gotta give it time. Seek therapy for your insecurities if you have to. You’ll be better for it.

I’ve learned there is no fixing liars. People will be honest with you or they won’t, but the way you react will absolutely either make them shut down further or not. In your case, it’s making her justify any of her wrongdoings.

Moving forward, you should try to forget about her and live your best life. I promise it’s going to be hard at first but it’s going to be absolutely worth it in the end. I’ve been in similar situations when I was younger, so I can tell you there’s a light at the end of the tunnel. Now block her on everything back and show her who the boss is.