My girlfriend doesnt have my phone number saved in her phone ?

[Jon]

So I've been going out with her for about 8 months now and I don't know if its cuz she doesn't trust me or what but sometimes she does take me for granted , she's been hurt in the passed before and I'm starting to think "hurt people hurt people " might come into play , I don't know I confronted her and she just answered that its not something I should worry about ....I'm lost.