My girlfriend doesn't want me to go Pride because I'm straight.

My (34M) girlfriend (31F) identifies as pansexual and has a lot of friends in the Pride community. I do as well. Pride is this weekend. She asked if she could go with her friends but without me. She said that because I'm straight that she doesn't want to be around a straight guy with all her queer friends at Pride.

It made me upset considering we are mutual friends with a lot of these people. I see all of them a couple of times a month at other social events. Last year we even went to Pride together. It was a good time. She didn't say anything otherwise. I'm not the most extroverted person but I feel left out.

To top it all off, I was then asked if I would take her to dinner beforehand with all her friends (I usually pay). So I feel a bit unsure about how to approach the situation and explain how I feel. I'm good enough to go to dinner but not be seen at Pride?

To me, Pride is partially supposed to be about inclusivity. I feel excluded not just from my girlfriend but also from my friends as I haven't heard from any of them regarding the situation.

Any advice other than just stating the fact that I feel left out because I wasn't asked to go? Am I overreacting? I'm fine with staying home with the dog I’m just trying to understand it.

TL;DR: Pansexual gf doesn't want me to go to Pride because I'm straight. Any advice?