To dream of your boyfriend symbolizes your feelings for him and the state of your relationship.
To dream that your boyfriend is dead reflects aspects of your own personality that no longer exist. Perhaps you are being prohibited from communicating your needs and wants. This dream may also be suggesting that the ties with this person should be severed, as the relationship is not progressing in a positive direction.... Dream Symbols and Analysis
It should be noted that when relating a dream it should be done without adding anything to it or subtracting anything from it. For, if a person does this he spoils and corrupts the dream. Moreover, Rasoolullah (Sallallaahu alayhi wasallam) has strongly prohibited anyone from doing this.
His also reported as saying that anyone who invents a lie linking it to him or his (own) father or friend, he will not even smell the sweet fragrance of Jannah.
His also reported as saying: “There are three persons whom Allah will punish severely on the Day of Qiyaamah : a person who relates a false dream : he will be made to tie a knot between two grains of barley which he will never be able to do; a man who paints a picture of animate objects; he will be made to put life into them which he will never be able to do; a man who leads a people in Salaah while they dislike him”.
It is advisable for a person who sees an unpleasant or disturbing dream that he spits thrice on his left side as soon as he wakes up and thereafter seek Allah’s protection from the accursed devil. Rasoolullah (sallallaahu-alayhi-wasallam) and his followers used to do likewise.... Islamic Dream Interpretation