Tell it to your girlfriend, sweetie.
If having your father murdered is bad –
This is actually just as bad as what you went through for her. If not actually worse, since the father was killed by an ex-boyfriend.
I mean, sure, your dad was king and his murder was pre-meditated – but at its essence – they are equal amounts of bad. The only difference is that this father’s death is a little bit accidental – but you DID mean to kill someone. So…it’s a nice justification to say that the worse remains behind but I’m not sure it’s entirely true.