After knowing them for at least a while. Did you ever just say, this is it with communication? A few years later, my ex still messages me. I heard from him recently after him not contacting me for a few months, and that he wanted to let me know that he moved back home for the time being and is going on a holiday soon, but kept reiterating that he has a job back here (where I am) next year. Only earlier in the year was he saying that he misses me and gets sad at times when he thinks about how well we got along. A few things occurred in our relationship that hurt me for a long time and still do to some degree.