I never used to cry. I used to hate people seeing me get upset, and thought they'd see me as weak and not strong for not crying. But now, I cry a lot. Sometimes I cry and I don't even know why. I cry at practically everything upsetting, or even things that aren't upsetting! My boyfriend cries sometimes too...he never used to for the same reason I said, that people see me as weak etc, but now he's really open with his emotions and cries. Maybe it's just a thing you're going through...maybe inside of you, without you being aware of it, you think you've cried too much in the past, so you don't want to cry anymore. I'm sure it's nothing to worry about, and you'll get better and more open over time.