I don't think she's very interested in you. Because if she was, she would take the time to answer you.
If your importance to her is lower than the importance of everything else in life, is that love? And just because she tells you that she loves you doesn't mean anything. She just wants to make sure you don't get off the hook. It's like a suitcase without a handle, hard to carry and a pity to throw away.
You need to act accordingly, stop writing her first, if she won't write first, you'll find someone else, and if she does, tell her that you love her if she asks, but don't write first. Business... business... I'm a little busy right now.
See if she becomes more active. But don't rush at her first call, take a break.