I always watch sad series/movies or make up sad/toxic/abusive scenarios in my head to get myself to cry every day because I genuinely just cant cry for self serving purposes only. Its been like that for years now.

But lately I cant even do that anymore. I used to be able to cry like a waterfall for up to an hour but nowadays the most I can do is maybe 3 tears a month. 
It doesnt even matter what i fantasize about anymore, i just either numb down before im about to cry or fall asleep.

Is there a reason this could be happening or has anyone else experienced this?