Live in with promise to marry, then once opportune moment came, breaking up & marry other

Got into an affair with a girl from same Institute(1 yr junior in class and 3 yrs by age). Wanted to complete marriage once she also complete her study & join in a job in a nearby city, which she agreed. She started live-in every weekend & vacation with me & even with my family like my wife. After 6 months, when I pressed her to complete marriage, she came out with the issue of her job unsatisfaction & how good she will be able to manage family affair if she gets into a cozy govt job. Mainly on this ground, I ignored the world & put my efforts in all possible ways to get a very best possible Govt job. Unfortunately it took away 4 precious yrs of my life, my personal career plan etc. She enjoyed all supports that a wife is entitled to. Her family also enjoyed various supports including financial, vacation together, staying in my apartment when in the city. For job preparation, girl resigned from her pvt job & at that phase, all supports including financial provide to her & her family as well. Finally she got the best possible Govt job that we were eying fokir her. Once she joined the job, she & her family, chose not to give any priority to complete the marriage. Girl started creating various problems like pursuing her freedom unnecessarily like socializing with ex classmates (boys) without including me in such get together, undertaking vacation trip with colleagues. One fine day, girl stopped taking any call & her father charred the relationship with abusive, intoxicated telcon to me & my family. After 1 year, the girl got married with a guy from rich family. Day before wedding, girls father called my mother & gave life threat in case I appear in the wedding venue. Everybody has the right to chose his / her own path in life. The girl, with the promise of marriage, was in live in with me for 4+ years & cheated me, pursued her own greed once opportune moment came. 1. What legal option I have to seek justice against such cheating & wasting precious years of my life. 2. During her high school & undergraduate study, the girl had another boyfriend, whom she broke up during post graduate study. Switching to me was motivated by same reason, "more resourceful guy". That time I ignored any probe, rather accepted the girls word that the guy was of loose character & bad habits. At the bare minimum, can I disclose everything to the husband of this girl.