Could you check my translation from a song, please?

I translated a song called 'Lovesick' to English.

My heart beats like a drum even though when I do nothing.
I sigh heavily just sitting without thinking anything all day.
People around don't care a lot.
They don't take it seriously, because they aren't in the same situation.
They laugh at what I never give it a try and am just going to give up.
I never knew it would happen to me myself.
I can't get deep sleep every night and just fantasize awake like a fool.
You even don't know who I am and never aren't interested in me.
Another day is passing as usual again with a jumble of thoughts.
Even though it's just a imagination, I feel small whenever I think if he already has a girlfriend.
I couldn't tell him anything anyway, because it wouldn't happen that he would like me.
I'm terrified that I will feel / get fear of the hurt that I could get from refusing me when I approach him.
Days flow away as always again with a mixture of those worries.
Could I see him again one day? It makes me feel heavy-hearted.
All I can do is just to hope eagerly that I could get a chance to see him by accident like a miracle.

Thank you!