How do you tell if a guy just cares about you as a friend or its more.?

if a guy writes this in a christmas card for you and says we'll always be friends best friends soon ready to date and then says i just want you to get better damn it since i wasnt well mentally. Aand then puts p.s i care about you. and is always there when you go through something aand says for example. dont worry about your brother you have m.when your brother is so mad at you he has disowned you