Ask her what you can do to make her feel loved? Read "The Five Love Languages". It's a great book that says people feel loved in different ways. She could just want reassurance, but it gets annoying after a while. Find out how she feels loved and work on that.

Some people are insecure like that. Ask her, why does she think you don't love her. If it's something specific you can fix it. If it's something generic make her see she's wrong. But careful. I say that to my guy all the time when I want to have my own way :p I guilt trip him into doing whatever I want :p I love him to bits, but that's how girls are some times

Probably heard it before from another guy who broke her heart, show that you love her. Like a date night

sorry im just gonna give you my honest opinion. its cuz she doesnt love you. and prolly doesnt want to be loved. my guess is daddy issues. im from vegas im really jaded. hint hint, be a cold hearted dick and shell prolly fall right in love.

Show her. Buy flowers, cards, or something like that. Don't just tell her.

maybe you dont act like you do