I miss you all

Dear friends , I really miss you all ! I want to talk with you and spend time with you all.  ,and play with you. As always, life for me is always beautiful and busy. I have moved schoolyard from one school to another, so I couldn't haven't been able to connect to the internet these days. By the way , I find found a job near my school, so I am not free during the daytime. Hope everybody's happy every day! doing well! Haha!

Notes:  
The phrase in pink is optional but it helps improve the flow of your sentence. 

What do you mean by schoolyard?  Do you mean a dorm or dormitory?  The word 'schoolyard' reminds me of the word 'playground' in American English.  

I changed "play with you" to "spend time with you" since the phrase "play with you" can sound a bit young.

You sound very casual and native-like when you start the sentence with "Hope everybody's..." 
Since you are an advanced learner of English, I replaced "happy everyday" with "doing well" since this is a more commonly used phrase in America.  

Hope this helps!