I'm so clingy and it's not good for me?

IMMMM SOOOO OBSESSED WITH MY BOYFRIEND and yknow at first i thought it was cool and truth is, i do love him very much but im the clingy type and it's eating me up because i overthink things so much that it upsets me. every little thing he does with a girl i get paranoid even when i know i shouldnt. i know this might make me a ***** but i really do like him and i know i should be less clingy i just dont know how. help?