13 years of togetherness

Me and piku were in a 13 years relationship of long distance where he became the most eternal part of my life. We gave each other all that is needed for a strong bond and love. We did had fights and misunderstandings but these moments made us inseparable. He is still in every breath of mine. But tomorrow, will be his one month engagement to other girl. His words were that his parents did not agree to our inter caste marriage so he said yes for his marriage to another girl. His this action has broken me into pieces. I am unable to breath clearly. His separation is making me feel worthless and horrible every second of my life. I do want to live for my parents and family but this is being the biggest shock of my life and i cannot bare the pain. I am still praying tongod to send him back everytime and also feeling pity at the same time that why I brought him so close to me, gave him myself completely and is now feeling him everywhere around me. Friends family suggested me to block him, delete his pictures, chat everything, but i know if I do it now, I will be spineless when I will need him emotionally. I do know that girl might be superb for her in every aspect,they might fall in true love, but the thought of him loving other girl is killing me. I was not at all the same woman when we were in relationship. I was the most rigid one and very flexible to the situation. I did tell him so many times to end this relationship and did stay quite far to let him go and explore his life, but that time he did come back many times, he even ended our breakup by proposing me on a phone call after being selected as an officer. Now I feel the table has turned, I have become the seeker and he as the strongest man on this earth without any feelings or emotions for me. Right now, I am just in a situation to punish and hate myself for everything I have done to my life. I pray good for him but still waiting...