My lover is leaving me to rekindle with his wife

He's committed to staying with his wife for another five years.
I'm completely gutted and feel such a fool. For the past six months I've been going around telling everyone about my new life.
I've bought a new bed, sofas and completely had my bathroom refitted because he prefers a power shower to a tub.
I've spent a fortune making my home man-friendly and now he says he's not coming after all.