I'm not really asking for what should I do...today the first time since New Year's, my ex sent me three texts: basically...very long texts, saying apologies for all that he's done, thanks for the memories, i hope you find someone who treats you better than I did, greetings for the new year, he says that i should be doing fine, and he's doing horrible and having depression (as if he wants me to feel sorry for him), and he's saying i should stay safe and live my life well, his future relationships will all be kaput and he deserves it...good bye. last time you'll be hearing anything from me.
And suddenly a fourth text telling me to not bother replying and that I should know, that's all good bye.
why bother sending me all these texts on a monthly basis for about two months now?
My friend had listened to me and told me to pray. I was praying. I'm getting involved in church more, so I tried. Spiritually, I know it was wrong to ignore these texts for someone is in pain. Physically, now I know from experience, don't let someone like this emotionally manipulate you, don't tell him too much about what's going on, don't have interest in his life, just be nice, this is someone in trouble and you're just being nice, don't let yourself be dragged into this mess.
So I sent him text asking should we talk, in a kind tone.
I'm just updating this for anyone who's following this thread.

I hope it will be useful to you. Thank you all for those who supported me in times of need and grief. Maybe, I can finally stand on my own now.
Maybe he won't reply. Maybe he'll be mean. But that's okay. It's none of my business. I don't hate nor like him. I hope it has been a valuable life lesson to myself and to my ex. And I hope we both find happiness. Sorry if it sounds cliched.