How can I deal about my past? Should I stay or should I go back to her?

Question

I am a female, I had a girlfriend in the past, so obviously she is my ex-girlfriend. We dont have anymore contact until recently, Im currently in love with her sister, and we have spent 4 wonderful years knowing and loving each other. Now the sisters dont really like each other obviously because of me. Now, my ex tells me...she still cares and loves me. Now Im feeling confused....

Answer 1

Be with her sister, thats your current girlfriend. Its broken up because its broken!  

Answer 2

You shouldn't feel confused, just think hard and listen to your heart...  But you should know who you really love and care for 100%.  Good luck =)