How to give space to my boyfriend?

I am in LDR. My boyfriend hangs out with his work team. One girl is close to him. She is better looking than me. I just hate the fact that he may find her beautiful at any time. They hang out a lot. They go shopping and to the pub (as a team). I told him that it was hurting me and I didn't like it. But still, he is continuing to do so. I told him to at least not send the pictures to me so that I wouldn't be sad or mad. But he said he doesn't like hiding and continuing sending pictures veryyy close to her. I decided not to tell him that it was making me sad because I already told him once. He should stop doing those things. But no. He continues those things. So I decided to ignore him hanging out with her, those pictures, and him. I am unable to concentrate on my studies because of this. I am a bit secure ig

I just want to give him space without bothering his enjoyment and fun and also me not getting sad

How to give space to my boyfriend?
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