Advice needed

My wife has no interest in sex. Last time we had sex was early November and before that it was about once every month. I’ve tried everything to make her feel more loved/special but nothing works. She also has a bad attitude all the time towards me. I’ve started doing it back (yes I know it’s petty) and I’ve stopped trying completely. The other day she asked me why I don’t try to romance her anymore, yet every time I try I get turned down and hit with her attitude. Just wondering what to do from here