I would just focus your energy on other people or tasks. I also was obsessed with an online man who never cared about me and never respected me. He was controlling and abusive and kept rejecting me while I kept rejecting him. Now, it is over and believe me, I am relieved and happy!! I sexted him many messages too. He also sexted me a lot. I think sexting is not a good idea if you don't know the person well, however, what has been done is done. Thus, I would get over it. We all make mistakes. Learning for our mistakes is the key point to improving one's life. Best wishes!