AIO my (best) friend of 20 years is suddenly too uncomfortable to get lunch with me

my (29F) best friend (30M) and i have known each other since we were kids. we never dated or had feelings for each other. i’m married now and he has a girlfriend, who he has been with for a couple years now. we’ve both been busier due to both getting new jobs but we used to go out for lunch fairly often, just harmless lunch outings. it’s been feeling like a very distant friendship lately so i reached out to see if he was available to grab lunch and catch up, but this response totally caught me off guard. don’t get me wrong, i like his girlfriend, but honestly i’m just kind of an awkward person, and our interactions are mostly just awkward. idk. AIO for being a little annoyed/hurt/what have you, that my friend of 20 years is suddenly now too uncomfortable to grab lunch without his girlfriend being there?