We all are in need of the perfect partner but after we get, we start to fight and get away from each other this happens due to your behavior which you may do unknowingly, so here are some reasons why she losses interest in you.
SHE HAS A HARD TIME TO ADJUST WITH YOU
The hard time is due to the way behave and it gets hard to figure you out at some days you are cool and next day you are warm at some days you will give her importance of the whole world and at some days she is just another girl in your life, sometimes you are too shy to talk and on other hands you express yourself too freely so it becomes a very difficult time for her and frustrates her.
SHE IS NOT ABLE TO SEE FUTURE WITH YOU
She may love you now and will continue to do so but she will be very uncertain about your future, she may like you at first but later she will find it boring to stay with you and if you are not worried about your future she will definitely try to get out of the relationship with you.