My ex-boyfriend has been chatting with me every day these days, and I don't know why.

My ex-boyfriend has been chatting with you every day these days. Maybe he misses you very much now, and misses your goodness. He doesn't want to be apart from you. He wants to be with you and get back together. This situation depends on your meaning and opinion. If you still like him and want to give him another chance, then you should seize this opportunity, get in touch again and give the other person a chance. Maybe you will be better than before. If you have completely given up this relationship and don't want to have anything to do with him, then you should clearly state your position and thoughts, and let her completely give up her fantasy about you, so as not to waste time, feelings and energy again. To sum up, this is my view on this matter. I hope I can help you and adopt it.