Breaking engagement

Hi, I got engaged to my fiancé on 8th June 2017 and we were to be married on 14th of July, 2017. This was a second marriage for both of us. We (he with his 2 sons and my son and I) went for a holiday to Kasauli on 9th June 2017 and returned on 12th June 2017; they stayed in my house for 2 more days and on 15th June 2017 they left for Mumbai, where they live. From Mumbai, he was sending me loving messages for 2 days, but suddenly on 17th June 2017, he started talking strangely. We didn't speak on 18th June 2017 and when I spoke to him on 19th June 2017, he gave vague replies about our impending marriage but finally said that he cannot go ahead with the marriage. On 20th June 2017, he blocked me from Facebook and wouldn't communicate. Even after I sent a strong message asking for the reason for the sudden and shocking 360 degree turn on us, he didn't bother to reply. All booking and arrangements have been made, our friends and relatives also booked their flight tickets and here I am totally lost. I feel terribly let down, deeply hurt, cheated on and extremely embarrassed. My old mother, my son and I are feeling very traumatised. Can I take legal recourse?