How long?

I am sad. And there's no one who could help me. Well, only one person, but he's more like helping me become more miserable :(
Why do you hurt on purpose someone you love? Does it feel good? I can't imagine. I have never done it. If i do hurt someone sometimes it's not on purpose. And i apologize. Why is it so hard to say you're sorry. Sorry. It's only 5 words, one big meaning that could make things so much better.
Oh, i am obviously thinking too much. I just want to go back at time and change few things.. I wish i could.
How long can one person be mad at someone they love? Just because they are so subborn? Oh, i just have to learn to live with it! Gotta be strong and just wait...