You exist.

Maybe you were sent here to save me. 

 Maybe the Universal balance has something to say to me.

 So very few things in life tend to actually phase me.

 Travel through the crowd so loneliness would never graze me.

And

I never thought that I would adopt a random kitten. 

 You strolled into my life and suddenly I was just smitten. 

 Was never really one for pets and such from the beginning...

 Lived with two to six of them, I guess some of it rubbed in.

And

Maybe you were sent to help me start to heal,

 To help me find my way again, back home to something real. 

 Because lately, I've been really low, detached so I wont feel...

 The pain of the rain that floods my world, sometimes I just can't deal.

But maybe you

 Could change my view

 I could use a little spark

 Something nonverbal

And most silent like my trodden heart

 I know I'm asking for a lot but it comes with a twist

 All you have to do to help is continue to exist.