Would this approach work with my crush?

I have a huge crush on co worker and last time when I confided in him about my mom who passed away. He also told me that his mom is sick.

So when I see him again, i am thinking to ask how his mom is doing so I can strike up some conversation that's not work related. I also want to tell him that if he ever needs someone to talk to I am available. Then give him my number so he can text or call if he needs someone to talk to.

The thing is I would like to get to know him as I person. I don't even know if he is single or not. I am also afraid of rejection so I don't want to be straight forward and ask him out. so I just want to make it sound casual

Would he see through this
Would this approach work with my crush?
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