I have been in a relationship with a girl for about 1 year and we both really love each other a lot and are sincerely committed... recently, her mom caught us chatting and got really angry with us... She threatened to lodge an FIR against me which would ruin my career and said she'll never be mine... we both are in a dilemma... I can't even imagine my life without her so breakup isn't an option... please help me... please... I'm 18 and she's 15&1/2... please help me

Gosh, you are just 18 and she is 15 , her mother is somewhat right, just think, she is just 15, she need to learn a lot, see a lots of things this world and you both are planning to get married.

I will not suggest to part away but for time being, limit your communication with her, may be once a week and concentrate on your studies and career. Give yourself atleast 4-5 years, by then you both will be adults as well legally independent to take your own decision. Remember, life changes a lot than you expect, so who knows after 2-3 years your priorities will change. Rest is upto you.