throw oneself at someone
and fling oneself at someoneFig. to give oneself willingly to someone else for romance. I guess that Mary really likes John. She practically threw herself at him when he came into the room. Everyone could see by the way Tom flung himself at Jane that he was going to ask her for a date.
throw oneself at
Also, throw oneself at someone's head. Try to attract someone's interest, attention, or love, as in He always had women throwing themselves at his head. [Late 1700s]
throw oneself at
To make efforts to attract the interest or affection of (another).