IT...sorry you are going thru this. I admit to some cyber-stalking myself after breakups. Well, maybe not "stalking," but looking them up on the Internet. Seems their lives went on. I learned to let it go. I hope the same for you. In some cases, like mine, and maybe yours....we just wanted answers. There were none.
I tend to be obsessive, going over past experiences and wondering what I could have said/done differently. (Actually, I no longer do that, but I can identify because in the past I have done that!) Proudly, I can say, I refrained from actually contacting the ended-relationship person. Instead, I worked on my own mindset. I hope you will do the same!