Please, Please, Please, Help Me Point Out The Grammatical Mistakes In This Story!?

The worst thing I could think of was she had gone with someone else, this could explain her absence, but why would she have done this? I had not given her any reason for that. I had not been with another girl or something. Maybe she just loved him and had decided that it would be better to just leave without saying a word or telling me about it, because it could've hurt me if she had. Whatever her reason had been I had to get used to that. I knew it would be hard because I had never been through something like this before. Most of the time I had been the one who left, threw things without an adequate reason. So how was I supposed to deal with something like this now? It was like putting myself in my parents' position, looking at their son ruining the house in front of their very eyes. But it had been my mother's fault; she educated me this way. And I knew this was what my father would have done if my mother had driven him crazy. So maybe this had been the reason she left me with nothing to say, maybe she had done it because she knew I would have done the same thing?