Hi Maddie.
No, I didn't know anything about this boy; I am all the way in England. I had to Google it. It is really horrible. I am very sorry for you, his gf and his other friends and his family.
I was thinking of posting a link to one of the articles so that other people on this forum could know who you were talking about, but I wasn't sure if it would upset you, so I didn't.
It is totally normal to have dreams about someone after they died, especially if you are very close to them.
It is all part of the grieving process.
The shirt in the dream is a sign from your unconscious that although he is gone physically, he still lives on in your memory.
Considering the circumstances of his death, it's a good thing that you had such a positive dream.
In my opinion, you should be very wary about seeing a pyschic after you have experienced a personal tragedy. Some psychics will take advantage of your vulnerable state in order to get money from you.
Have a look at
this.
As I said, this seems like a very positive dream. However, if you find that you are having problems dealing with your grief, you may want to see a counsellor.