how to stop caring so much!!

my bf is so laid back and doesn’t care that much about most things things, but i will get so worked up about things and start freaking out that i’m gonna lose him and then i look crazy. but it’s only when we aren’t together. through text he doesn’t know how to make me feel reassured that everything is okay so i start saying or doing too much bc i just want him to show me that he cares but he doesn’t ever trip bout anything. that shouldn’t be a problem, i should be happy i don’t have someone who’s crazy but damn can he show a little more care ?!