Judging from what you say
1 You was having argument - why?
2 What is the relationship like? Be honest please as nobody is here to judge you only offer advice and support
3 Is this the first time you have split up, if not then how many other times and for what reasons?
I've asked the questions, so rather than just answer you with 1 sentence, I can answer in more detail and also give you an answer that may be of some use to you.
And most important thing you need to be aware of is the bit below
- NO, you are not a bad person!!! Saying things in the heat of the moment is nothing that anybody has the right to say that your a bad person!!