[Sundae]

Fresh you're just going to have to accept that she is someone who doesn't check her phone all the time. You've told her it stresses you out and that you worry when you don't hear from her and it hasn't made a difference. Therefore you have a choice whether to keep letting it wind you up, or simply accept it.

I know people (no, not just OLD people) who genuinely aren't ruled by their phones. She's obviously one of them.

BUT. And it's a big but. You can bet your life that if it was important enough to her (new relationship, waiting on test results, family crisis) she would have the phone in her hand all day.

I'm notoriously difficult to get hold of amongst my circle of accquaintances. Sometimes I'll get a call at work from my Mum checking I'm okay, because one of my friends hasn't been able to get hold of me. If I haven't paid my phone bill I'll sometimes leave my phone off for two weeks until I can afford to pay it. It's strangely liberating.

Try backing off. See if you can leave it 12 hours before you try again. Then 24. Then 48.