Re: What should I do? 
Not “might”…it IS stupid. His family didn’t contact your mother without talking to him first. If he really wanted to marry you, he would’ve convinced his family already and they (him AND his family) would’ve turned down the other family no matter how strong the pressure is. You are not their #1 choice. Move on with your life.
Oh and learn a lesson from this. In these arranged rishtas, the other side can back out at any moment without a “good” reason. So do not allow yourself to become emotionally attached to a guy until at least a wedding date has been set.