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Airman, if I'm investing in someone, their follow through is very important to me. Very. I've gotten "irrationally" upset at people who, after I've put my emotional energy into them, act in ways that disrespect what I've invested. Even something as simple as falling asleep on me in the middle of an IM conversation (that
really bothers me). One offense I can usually handle, maybe two. But when it starts repeating... things build up to an explosive point.
I've only unfriended two people on FB - one is just plain crazy and the other was an LSE who repeatedly let me down and who still doesn't quite get the concept of follow through and valuing my time.
A REALLY easy way to prevent me from feeling abandoned and put down is to tell me directly what to expect. If you can't make a meeting or you need to go or something comes up, TELL ME. Text message is fine. I'd rather be woken up by a midnight ping with an explanation than feel the alternatives.
The way you fix it, for me anyway, is to apologize very specifically (not just "I'm sorry you feel bad") and perhaps even ask me what I'm feeling and why. And LISTEN, for goodness sake. Don't interrupt, don't try to "fix" me, don't make excuses. Someone who
listens, actively, is disarming. Then don't abandon me again and make active, obvious efforts in the opposite direction. It, admittedly, takes a lot of effort to undo something like this.
That said, you need to set healthy boundaries for how you expect to be treated, too. You are a valuable human being, with your own heart and needs. You need respect and kindness, too. At some point, maybe not right away but don't wait too long either, gently and matter-of-factly explain how you feel, specifically as it relates to how she responded. Say exactly what you said here, that it puts you off, hurts you, and makes you not want to pursue her, and anything else that you might feel. Then perhaps describe how she might better communicate her hurt.
It's OK and NORMAL that you feel hurt by her response.
If you don't set boundaries, gently and firmly, then that sort of relational pendulum that you're starting to describe with her father vs. you can quickly get damaging.
This sounds like it might be a long-term puzzle, filled with hurt but also lots of potential joys. You're going to need lots of patience and probably other sources of life/joy in addition to this relationship (to stabilize you when things inevitably get rough). And, um, by "other sources of joy" I don't mean other women... I mean, like other hobbies and activities. ;)
Please take all this and translate it into Brazilian culture as needed. :)