I believe your friend means well, and is just concerned about you.

Yes, death in a dream often just means change. In addition, when your friend dreamt about you, he might not have really been dreaming about you, but about some quality that you represent to him.

I think you should reassure your friend that dreams communicate ideas through symbols, and they shouldn't be taken literally.

Unless you have some logical reason to believe that there is a good chance that something bad is going to happen to you, I wouldn't worry about it.