Decide that you know all there is to know about yourself and life in general.
This should allow you to act holier than thou towards your lady, your friends and the general public. This will offend them deeply and put a decent size wall between your false and true-self. Once you've alienated people, they will no longer tell you that you're being ridiculous. For most of my life my friends have been my litmus. They've called me out on counterfeit toughness, huge delusions and a few terrible outfits, like the overalls with only one strap.
When the potential of failure pops up, so does our false-self. We're trying to be the person we wish we were in these tight situations. Instead, it's a completely mixed up and messy hybrid of old wounds and people we look up to.
Allow your relationship to crumble.
By now your significant other will be wondering what happened to the person they fell in love with and if you're ever coming back. You won't be coming back. They will be leaving. It's not easy to say how long this could take. For my girl, it was about 9 mos. Pretty good on her part.
Spend a month or so blaming them and of course, God.
It's funny. When a situation I'm in doesn't work anymore, I look under every other rock except my own. There's no way I could be the common denominator in these jacked-up relationships. I'm a super-christian. I pray, follow the commandments and even tithe (not quite the full 10%, but still). I'm not comparing my self to Jesus or anything, but I'm as close to perfect as it gets. It's God's fault. He is always doing these Job-like attacks to see if I'm tough enough. Well it's starting to piss me off, God. Back off a bit.
Hit rock bottom and pray for answers.
Now the real journey begins. This is the equivalent to purchasing plane tickets. You are definitely booked on a flight and turning back now would just be blasphemous and a waste of time. Let him take you on a trip. Let him work in your life. Let him use this situation