Is the phone too much ?

My girlfriend has a problem that many many people in today's society has. She is on her phone too much!!!! She is on Instagram or something when we're together about 45% of the time. And anytime we facetime(Video chat) about 78% of the time she is on her phone while facetiming me off her iPad. I've talked to her about this and she says "I'm sorry I'll stop" and she acts like I'm the bad guy or that I'm like taking something away from her, she then will carry herself in a sad like way for a bit and it makes me feel guilty.  My question is am I in the wrong for trying to get her to pay me attention ? And if I'm not, how do I get her to stop giving her phone so much attention without looking like a jerk?