Kindy Buddies (Student And Teacher)

Alexander and Lilath were best friends since Alex was assigned to Lilath as her Buddy when she was in Kindy and he was in year five.
They were best friends for a very long time, around ten years when Alex moves away and not contacting her. Alex hurt her badly when he left and so when he comes back but also as her teacher, will she let him back in her heart?
Or will his disappearing act leave him stranded?
Can Lilath fight the attraction she feels for him and can he fight his way to her, even if she has a boyfriend she clearly adores?