If one holds frame and effectively utilizes push-pull technique?

EDIT:

Been in an LTR-type relationship with this girl that last few months. This was my first LTR and I’ve acquired oneitis. We knew I was graduating from college in May and she has another semester but she’ll be in Europe half the summer and she actually doesn’t want to be in an LTR and let me know periodically that she would “feel bad if I had these expectations that she was going to be my girlfriend”. Yet, she would still act like my girlfriend all my time and I acted like her boyfriend because I was beta and I gave her everything.

A week ago, she finally said she can’t keep stringing me along because she knows I’ve been looking for a relationship and she knows she can’t give that to me so we have stopped talking with each other and I’ve felt terrible this last week (lacking abundance mentality) and now I’m left wondering if it was just the light switch merely being turned off and if so, how to prevent that in the future?