I need help

How do I stop being a crazy jealous person 
He's perfect he's sweet and we've been together for 2 years I've know him for 6 and he's never ever had a bad reputation but I feel as I'm always hurt 
My dad hurt me and he left my family so I feel as my man would leave me because I'm not enough I get jealous knowing he talks to other women even tho I know he's not flirting but he's super friendly and I hate that cause dumb slow people think that's flirting how do I control how I feel without making me look like I'm clingy