Is my friend in love with my ex and does he love her back?

My friend stacey broke up with her boyfriend in the 6th grade and i date im in the 8th and she always hangs around him now and she always says hey jake ur a pervert or hey jake do u like jazmyn and she always tell me he broke up with me i am tired of her so called joking and rumors are going that he kissed her and hugs her cause their families know each other and my homies say she likes him so is she in love and is he cheating