This is my first LTR and so far she has many green flags, took her virginity, submissive to me (and parents) only, only had 2 previous BB bfs (texting buddies). We are both going back to our home countries for summer soon. Yesterday I saw her texting one of our mutual male friends (my to-be-roommate). She told me he is going to visit her country and she is going to "bring him to have fun" (it was in another language). I raised my eyebrows and said "you 2?". She seemed to understand that I do not approve of hanging out with guys alone, so she said she will bring other people with them. However, before that she did ask if I was jealous, I said no, but afterwards realising that I could have answered this shit test better. The reason being that after telling me she would not make this a private hangout, my beta side kicked in for a split second and reminded her that she didn't want her friend to buy me dinner (when she came to my home country) since I once helped her with her essay. I should not have further pushed this topic after her agreeing to make it a group hangout.

My question is did I approach/handled the situation correctly? We 4 of us hung out together (my to-be-roommate and another girl) and he teased my gf a few times in front of me and I told him to stop. He looks very BB to me, telling me he is trying to find the one. So I don't think he would do any alpha moves on her.

Typing this made me realise that I might be having insecurities. I have mostly maintained frame throughout this 1year LTR and she knows that hanging out with guys alone is not acceptable behaviour. However, going back to her home country where we will be in LDR for a month or two I will not have control over her. I guess this made me feel powerless.