The first guy i ever fell for died last week and i can't stop thinking about him and it really changed me i try hanging out with friends it works for a bit then he just comes back into my head help?

You are just grieving. Everyone does it in their own way and for as long as they need to. As long as you continue with other things I wouldn't worry about it. Your age, how many other people you have known who have died affects how you react to this death. Any death brings up a lot of things. What was, what might have been. You can question your feelings from the past and ask yourself all kind of questions about it. A lot of the grieving process is not so much for the other person, but grieving for the time we will not have with them or for mistakes we may have made while we did have them in our lives.

My personal point of view is to enjoy the time you get or have had with a particular person and don't grieve for some possible future that didn't happen. Behave with people as though you may never see them again and don't do things you will regret later. It's hard to do and you will probably get burned in the process. Most people don't behave this way. If you do, you can feel good about yourself should something happen to someone you care about and you can go on with your life without regrets or at least less of them.