We’ve been living together with my gf for three years now already.
Our relationship has been fluctuating a little, but generally everything was fine - we’ve been travelling, cooking, discussing problems, met each others parents.
Sex was pretty regular - every other day for almost two years.
The last year has been dreadful - our sex rate dropped to once a month or even two (if i cum fast - i’m not getting another attempt), gf became demanding of romance - it’s either romance or no sex.
She gave me clues and i decided it was the right time for our relationship to progress - and proposed to her, now we are planning a solid budget for our wedding and such.

But despite my hopes our intimate life hasn’t become any better - when i try to initiate discussion it always leads to - give me more romance hysteria. Don’t get me wrong, i’m not a slob or something, i have a great job, i exercise, dress well, have a good sense of humour, sometimes bring her flowers, invite her to go out, cook dinner and put candles everywhere - but it just isn’t enough - she demands more romance and creativity. What is especially ugly - tries to trade it for sex.

It’s weird - we cuddle, and tell each other nice things, but we almost don’t have any sex, because i find it unusually hard to get her excited. Sometimes when we are right there near, one little thing can happen (like a phone call or i dunno - a book falling from the shelf) and she is turned off immediately. Discussion is impossible - when i try to talk to her - she says she is tired of discussing it and demands more romance. I turned to porn and started thinking about other girls and even escorts (while planning the wedding).

I mean… what is wrong guys? What can i do to fix the situation?

Any insights would be extremely appreciated.