I'm not sure if I can cry
Why do you think you might be unable to cry?
I try everything to cry, but no matter how hard I try I just can't cry.
It's important that we are able to cry at times, as it's a healthy way of expressing your emotions. I would suggest speaking to a therapist if you think this is a problem, as they might be able to help you out with your emotional issues.
I won't cry at all and maybe I'm soulless.
You are unique in ways that you can express yourself, but if you really do want to cry, perhaps you should talk to someone about it. Crying is a way we are able to process both sad and joyous things and you deserve to have that.