Throw (oneself) at (someone's) head informal verb phrase
The verb "fling" can substitute for the verb "throw".
If a person "throws herself/himself at someone's head", he/she makes a great effort to make someone love them.
Just let him fall in love with you naturally. Stop throwing yourself at his head.
A: "I have invited him to my party several times." B: "Are you throwing yourself at his head? Stop it. It's useless."
He threw himself at Mia's head but she had been in love with another guy.
The verb "throw" should be conjugated according to its tense.