How can I make her scared of losing me?

Anonymous
I'm not heartless or a player or anything, please hear me out:

My girlfriend honestly means the world to me yet I often feel like I don't mean the same to her and it's getting to me and hurting a little bit sometimes. We've been together a few months now, so I know it's still early days but still..
She has recently started coming out of her shell a little bit lately but something tells me that she's crawling back into it, yet I hear that apparently she always tells her mum she really, really likes me and that she's told her she can see me and her being long-term and the more she gets to know me, the more she is enjoying hanging out with me. Yet I hear things like this from her mum and not herself. I even feel like her mum just tells me this to make me feel better sometimes and often makes me wonder if it has really been said.

All I want to know is from herself that she cares about me and she cares about our relatiosnhip as much as I do. And I was thinking of somehow trying to make her scared of losing me somehow without actually losing her..

What should I do?
How can I make her scared of losing me?
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