Head VS Heart

This is what I felt during this "War" days with her..

My Heart: It tells me to stay with her because I'm still in love with her. For the past 1 year with her was like wow... In a relationship, there's some ups & downs, well for me mostly downs plang but that's how it goes. Right??

Should I go with my Heart instinct or.........

My Head : It tells me to just end it with her & start a new/fresh life from now on because I had suffer enough for the past 1 year. Most people would say that Life is Unfair & It will go on as u become much older.

For those who have an advice or 2 for me, please help me out. I would love to hear it. Im open to anything......