Let me start this out by saying I've had no bad vibes from the best friend I don't think there is any cheating going on. I fully trust her and my bf has they've given me no reason not to.

Side notes: They've been friends for about a year. We've been dating about 3 months now. The party is technically two days Friday wine tasting at a winery, Saturday bar hopping and they're all supposed to sleep at her/her parents house. My bf is thinking of only going Saturday. I'm F21.

There is a friend group that consists of P (M26) O (M20) C (M21 my bf) and L (F21)

They're all really close and its great that they all hang out all the time. It's L's bday weekend, her 21st. They're all going drinking. P and O are NOT going. L has strict parents and would be weird about P because of age difference and O because he's not legal to drink yet. C my bf is going. L is inviting other friends that my bf DOES NOT know. I was not invited to the birthday party and I'm a bit upset about it. I don't think anything is going on between them but I feel it's just kinda disrespectful. This can just be a bit of a culture thing but if I invited someone to an event of any sort their partner/spouse would also be welcome to come. When it was first brought up I was under an assumption that if I'm available I'll be tagging along. As time went on and the more it was brought up I realized my bf had absolutely no intentions of bringing me.

It's been digging at me so I decided to talk to my bf about it last night. The party is this weekend. When I brought it up my bf immediately was upset. He's not mad that I'm worried about it but his last gf was a bit crazy and created major problems with L. (I can confirm she is actually just crazy). He just wants L and I to get along. I like L, I think she's cool and I want to be friends with her. We just don't know each other very well. I found out he never even asked if I could go. This hurt me a bit more. And I finally got the plans of what the party entailed and that my bf intended on staying the night. I don't want to stop him from going. His response to all this was "I just want you to be able to trust me". Which I do. I'm also a bit hurt that this was his response to me being uncomfortable with the situation and didn't suggest anything to solve it. Just seems like he's sitting to the plan and leaving me in the dust about it.

I'm thinking about giving him the option of either seeing if I can go or just not staying the night and communicating to me better about where he is at and what he's doing. Otherwise I don't think I can get anymore comfortable with the whole situation.

I need thoughts/opinions/advice pls.