are u sure u'r not telling my story?

well it looks like a coincidence?
Am also datin a girl presently who happened 2 meet me through her sister with whom she lives.
The only problem am havin is that she seems 2 have a deep love for her school boyfriend but gives concrete reasons why she thinks she may most likely end up not getin married to him.
As for me ,she knows am serious and she has vowed never to have an affair wit this guy again.
To my expectation i discovered she still dates this guy secretly.
I however called it a quit because i realized that even if i get married to this lady she could still be seein this guy(her school boyfriend);and i can never stand such.
She has been beggin me since then. I love her bt i don't know if i should take her back because this is the second time she's breakin off our relationship 4 these guy.
I understand this first love thing and how ladies go about it. but i don't think her heart and will is strong enough to manage the situation.For that i may most likely not accept her coming back