First of all, I appreciate your love
Your story says that, you are a true lover.
You care for her but she thinks you don't trust her.
And one thing you may not know is that
"She thinks you are someone who loves her so much that you will accept everything and no matter what she does, you will surely return back to her.", In simple words, your value in her eyes is next to nothing.
Imagine how much would you care for a dog, who comes back to you even after several kicks you gave.
Don't mind, it was just an example.
The basic idea is that "you have bowed so much for your love that she is taking you for granted"
Its up to you to now decide but remember.
When you love someone true heartedly,
Set her TOTALLY free
If she reurns, she's yours
If she doesn't, you are luckier than her