Bf lied to me

My bf is a rn so works in a predominantly female job. In the beginning of our relationship I was insecure bc of his wrongdoings. I have gotten so much better over the years. He worked at one hospital and had this friend group who he’d always go out with. Then he moved locations. A few months later one his girl friends switched to the same place he did too. I’ve asked about her in the past and he always brushed it off. Said he didn’t even have her number. One day I was going through insta and saw her profile. He liked a few of her pics of just herself. I brushed that off. Another day I was standing right next to him when I saw him swipe her text to clear it from his Home Screen on his phone so it wasn’t there anymore. When I mentioned it to him later, he told me he doesn’t even text her like that.

Well, a few days ago he ended it with me. We were going through a rough patch now for a few months. He wanted no contact but I’ve been reaching out since, which I know is my fault. Finally today I wasn’t going to. Out of my own anxiety I asked my sister where he was. He shares his location with her but not with me. She told me he was at a restaurant. Mind you he lives an hour away. This restaurant is close to my parents, where I’m at now. I know it’s bad, but I drove over there and around the parking lot to see his car. I left and texted him asking if he could check the mail for a package. He told me he was at his sisters, which I know isn’t the truth bc he was just at this restaurant 10 mins prior. I told him the truth and he blew up on me. Told me he was 100% done now. I blew up his phone and was asking who he went out with bc right away he was defensive. He wouldn’t tell me and just told me he’s done. Well after two seconds of investigating work, I found out through insta he went out for drinks with that same girl along with another one. I don’t follow her but saw on her story. She tagged the other girl in it and my bf but made my bf’s name bigger than the other girl.

If I had nothing to worry about, why is he constantly hiding this girl? He’s told me countless times she’s just a friend but idk. He knows I’ve been uncomfortable with her and not even two days after he breaks up with me he goes out for drinks with her? Am I in the wrong??