Marioman, I don't know you or her, but I am guessing that you are not entirely to blame for all this. I may be wrong, of course, but I don't think so, based on what you have said here.
However, you seem to be taking the blame ~ from yourself and others. This isn't rock bottom ~ this is a chance for a new start.
If you are accepting, from her, that you are in the wrong, then is it so surprising that her father thinks that way?
When a relationship ends, it is painful, but I think, long-term, you will find someone who suits you better & who won't put you in a position where you are bound to feel hurt and jealous, and then blame you for doing so.
You are still young; you will find Miss Right.
Yes, you will grieve over this relationship for a while, but you will soon realise that it would not have brought you long-term happiness, and that you will be better off with someone who wants you,and does not keep flirting with other men and then getting annoyed because it upsets you.
Just give yourself some time to get over this.
Time heals and it also allows you to think objectively about things.
Take care!
