Marriage in Hinduism for unrequited love.
Does Hinduism provide for assuming myself to be married with someone and considering him as my husband without even actually marrying him like Amba considered herself to be already married with king Salva and assumed him to be her husband in Mahabharata? If so, then please tell me how can I make someone my husband this way, as in what are the provisions, procedures and rituals for establishing such a marriage. I really want to marry that someone in this way and consider him as my husband for my whole life.
I can't undergo the usual marriage ceremony with him because this is an unrequited love and it's not possible for me to undergo a marriage ceremony with him whatsoever. Further, I'm also ready to remain unmarried for my whole life in the eyes of the world and consider him as my husband from my heart without actually performing the usual marriage ceremony with him. Moreover, I cannot think of any other man in my life except him, least I can love and marry any other person so, without trying to convince me for doing otherwise, please let me know if I can marry that person in the way I'm asking. Thanks.