Why men act differently?

Why guys act different after marriage?
We used to have a great passion about each other
Caring talking cuddling all the time but now everything is decreasing not like how we used to be and his excuse is work , tired of work, people do so in the beginning of relationship to ensure everything will go smoothly but we did bonded and got married so we don't have to do so to prove that to ourselves, we became one , can you believe how lame this sounds?
What can i do?
I am literally boiling from the inside out and hating myself and everything a out my life because of that , what should i do?
Why men act differently?
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