Even if you have limited time with a child such as a couple hours a week, you must allow that child to call mom when requested.
And so on….
See if she will agree to go with you to relationship counseling sessions for unmarried couples.
Better get some hiking boots.
And if she really wants the relationship to work out with you, she needs to get her priorities right.
I recommend the whole book for more detail, but it sounds like this relationship was doomed because of neediness.
You need to give something for a girl to respond to in a conversation, or the conversation will die.