Love but not in love

Hello,

So my wonderful girlfreind and I have been together officially for 4 months and hanging out for about 6 1/2 at the beginning I was very hesitant about putting in to much emotion as she had just gotten out of a year long relationship with her "first love". She does not have any contact with him but sometimes I
Could tell she was really sad and my gut said she was not over him. A couple times we ran Into him at parties and she seemed very bothered Although this was the case she did invest almost all her time into me and I feel like she has been trying really hard to feel better. She Always tells me how perfect i am and how gratefull she is to have me. She tells me that she really didn't think guys like me exist. Recently I decided to have a heart to heart with her. She told me that she is very cynical towards relationships after hers went so bad, she told me that I mean everything to me... She said she loves her ex but is no longer in love him.. And she is deeply in love with me...
Ladies please help me as to what she may be thinking? Could I lose her to him?