I have been an insecure girl because I was abandoned or cheated on in past relationships. I’ve been with my bf for 4 years and we’ve been happy except some low points which everyone goes through. However the past year I got insecure from a new female acquaintance of his who he said was attractive. Idk, we established a few boundaries but still ended up fighting over it. I did the fighting. However now I’ve come to accept her existence after some fights but I’m not completely okay. I mean he wouldn’t be too friendly with her before but now he’s starting to again and I’m not sure if that makes me happy. I’ve decided to let go but I wanna completely detach myself from him because I love him too much and am too attached. So is there a way to emotionally let go before breaking up completely? I’d really appreciate some practical advice.