<human>: Provide a brief overview of the text.

So I'm going to preface this by saying that my boyfriend cheated on me a month after we first started dating with an ex-gf. Since then he has done a lot to rebuild my trust but obviously I still struggle sometimes.

I recently found out that he is planning on getting dinner with a girl who has been his friend since high school. (I didn't find this out through him.) She has a boyfriend and likes our couple pics on social media which makes me slightly more okay with it but I'm still bothered that he hasn't told me about it.
<bot>: Would it bother you if your SO was planning on getting dinner with a longtime friend of the opposite sex without your knowledge? When is this acceptable or unacceptable?