For someone who doesn't have time to be in a relationship, the two of you seem to be getting together enough?
So what is it. She does have the time but is hesitant to be with you in a committed sense or, she doesn't have the time, which of course, begs the question why you are meeting up with her so often.
Shit or get off the pot as they say. You tell her she either commits to being able to be with you full time by making a schedule as to when she can and cannot be together with you so that you see if it will be enough for you or she gets lost and you never contact one another again so that you can get over one another enough to actually form something good and serious with someone else.
This half assed THING you have going with one another is a giant waste of both your time and emotional well being.
If you have the self-respect for yourself that you say you do then you won't let this silly uncommitted dabbling go on another minute.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion