My bf of a year and a half was texting his ex and lied.

So me and my boyfriend got together last Feb and have had some rocky stuff but nothing out of the ordinary for a relationship. I have trust issues and other stuff wrong with me in the head but I love this guy. We started talking nov. 2023 and I thought things were good fast forward to 8-3-25 (my bday) I found stuff in his phone that he had texted his ex a few months after we started dating and was texting her while I was on a week long cruise with family a month after starting to talk. And he was telling her that he was bored and just checking on her and whatever. Still had some nudes in his phone of her and just shit I didn’t wanna see. I want to stay with him and one minute I’m thinking we’re okay and another I’m balling my eyes out and I just don’t know what to do anyone.