Should he ask me to accompany him?

My boyfriend and I have been together for 7 months and recently moved in together. We have a pretty good relationship, in love and happy together.

He is German, has been in Australia for almost 10 years.

He is a member on Facebook of a German Community group in the city we live. He doesn't have a lot of close friends and so I totally understand him being in that group and support that.

While scrolling through my own newsfeed I saw he had made some comments to a post in that group. A female member was trying to organise some sort of social meet-up for whoever was interested, maybe for lunch or coffee obviously with the intention of making some German friends in the city. My boyfriend expressed interest and said he would love to meet everyone.

Normally I wouldn't care so much but it seemed that the people who were all in for this meet-up were mainly females all but one other male. I checked out the profiles of these girls out of curiosity as most of them were fairly attractive girls. Some had partners as I could see their relationship status and others not.

The other guy has a partner but he at least said he would only go if another male went so obviously he was being wise considering it was mainly a group of girls.

My partner hasn't mentioned any upcoming get togethers with me and just wondered if he should maybe indicate something of his possible intentions or interest in going. Like if that was me I'd be like "Babe, don't know if I've ever mentioned but I'm in this German community group on FB and some of the members on there were talking about organising a meet-up, I'm interested in going as a way of making some friends that I can relate to, would you be interested in coming with me or if not I hope you don't mind if I at least go"

He just hasn't said anything and I'm wondering why he wouldn't include me in this or at the very least make a casual mention of it. Should I be worried?