<human>: 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.

Can you succinctly summarize the text in 1-3 sentences?
<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?