"is it normal that i still love a guy who is going to marry very soon?

actually i have been involved with a person for last three years. obviously with the passage of time my love and care for him grows more and more and very much more..but at start he said to me that he is very much bound from his family and he has to obey them first.being in love with him i felt that he is a mature guy with gud job and he cud handle the situation while marrying me.after two year he himself came to my mom n informally talked abt our intention to marry..for this act my family had no issue so that i became more hopeful after that..actually he started loving me so much as i observed his intense care for me.
unfortunately two months back he disclosed that his mother fixing given take relation to a gal just because of his sister like his sister marrying a guy and the guy's sister wil marry him (my love).he was quite disappointed n wot i m feeling is like helpless because he is very much compelled n he still says i only love u by heart bt i cant go against my mother..now plz tel me that my feelings and respect for him is growing more and i even know i cant marry him ..so guide or suggest me wot i wil do?? he even offered me for second marriage after his first marriage as he said ,"he is getting married for his mom n its only formality.."..plz frnds help me out ..m really depressed!!!