My husband and I have been together for three years now and I get jealous over everything! With past relationships, I wasn't like this at all. Just with him. I get jealous if he even looks at girls. I don't know why because I know he would never do anything to hurt me, but I still get mad about it. HELP!

Your jealous because you love him so much and deep down your so scared to lose him you try and keep him to yourself so there is no risk of losing him to other woman! It's normal and some girls aren't jealous and some are.
It depends on what type of person you are. I'm the same way with my hubby and we been together for 6 years and I'm 19 and when a cashier even batts her eyelashes at my hubby I go off. It gets better after a little while but it never goes away you have to try and better yourself to not be physco when your jealous but be rationally upset. Love you hope I helped!