Best friend of over 20 years. Never really had any ?issues?. Our life situations are a bit different, but these have never affected us. We see each other or speak about once a week. I?m getting married soon (tiny ceremony - no fuss, been with partner for decades) and recently she has kind of been a bit weird around me. I?m hardly discussing the ?wedding? since it all feels a bit weird to me, so it?s not like I?m getting all ?Bride-y? on her ass. 
I am not able to broach the topic since she gets extremely defensive. We met for dinner and it was so clear that the entire evening was ?strained?- it wasn?t ?us? at all. Everything I spoke about was an opportunity for her to have a subtle dig - DVDs I watch, work, kids - you name it. Please note, she is never normally like this. I can tell her anything, she never judges, she is my lifelong friend and there?s no topic we haven?t covered or things we haven?t been through.
Although I have broached it in a roundabout way in person ?Everything OK with you? Lately you?ve seemed really unhappy/stressed/etc?? - she has denied everything. It?s really playing on my mind, so I texted?and she brushed it off again. I have since spoken to her briefly on the phone twice and it?s still odd. I'm dreading seeing her in person.
Possibly, me getting married has made her examine her own situation etc?but what I?d like to know is ? what can I do now? If that is the problem, it?s like she hasn?t even acknowledged it herself, although she?s so self aware, I?d imagine she must have done.
She helped me pick out a dress and wants to buy me flowers as a present ? so it?s not like she?s not acknowledging it. She is supposed to be getting me ready on the day itself ? but I can barely look her in the eye without feeling very anxious and 
WWYD?