Damn.
My room mate has her boyfriend over almost every day. And when he's not here, they exhange about 8-10 calls per day.. just to chat.. say I love you.. say funny little things.. because they miss each other.
Now you better fucking believe if a man called me 8 times a day he'd better have a reason. I don't call people to "chat", unless I am catching up with a friend I haven't spoken to in weeks. I've learned not to need constant attention in a relationship also. Clinginess can be annoying as hell. On both sides, depending on who is the clingy one. As with my roomie and her boyfriend, they are both clingy so it works for them.
I can't stand clinginess and I'd ignore my calls if someone called me 8 times a day.
She is calling you because she cares about you, and maybe she cares about you too much. Too much, too quick. She's got a huge crush on you and therefore will keep calling to just "chat" or hear your voice. You have to find out why she thinks it's OK to burn up a man's phone.
Tell her that it's perfectly OK to talk once a day, or once every other day.. And sometimes it's Ok to not talk for two or three days. If she thinks going a day with out calling you or talking to you is going to ruin anything, then she's only temporary herself.