What a wonderful spring!

When your best friend dies and your grandfather disappears, you should be strong. Much more strongest stronger than usually. I hated the Russian spring, but now I love it ... I can smile and sing and even dirty snow is not an abomination. Why? I need this spring, I need dry asphalt and fresh smell scents.
And now I'm absolutely sure that no one should be alone.

"Hate" needed to be in the past tense (you could also write "I used to hate the Russian spring ...") because with the word "now" you seem to be making a contrast with then and now.  I changed "smell" to "scent" because sometimes "smell" can imply an unpleasant smell whereas "scent" has pleasant connotations.  However, it's a subjective choice.

What a wonderful spring!

When your best friend dies and your grandfather disappears, you should be strong. Much more stronger than usually. I hate Russian spring, but now I love it... I can smile and sing and even dirty snow is not abomination. Why? I need this spring, I need dry asphalt and fresh smell.
And now I'm absolutly sure that no one should be alone.