Hi Susan, I think your English is not bad at all!  Here's a few suggestions of how you might say what you want to a little more clearly:

A Little Sad

I will graduate from university in several days and I will leave school on the 9th of this month. Someone stole my 'phone yesterday when I was in the city centre to pick up some money. Now connecting with my friends and my mum is difficult and so many photos were on my phone; group photos of my friends and me, my graduation.  I don't like the city, I hate it actually, but when I think about leaving here I also feel some sadness.  I have some friends here and I don't know when we will see each other again after I go back home. So many memories, both happy and sad. I heard a group of students singing last night; boys and girls sang, "Having a nice trip".  I thought they are graduates too. We will graduate, we will each start a new chapter in our lives, we will have to work...  I dont know how to express my feelings now ... Haha!  My bad English... By the way, I will continue learning English. I have enjoyed learning English this year.  I will graduate from university, but I will never graduate from learning English!