How can I stop feeling so jealous and possessive in relationships?

I get jealous whenever i have a boyfriend, especially my recent boyfriend. I’d get jealous at things like him going out with friends (even boys), if he looked or spoke to another girl, also at one point even him speaking to his girl family members. I used to get so emotional and angry whenever he’d mention anything that had a girl involved in, we’d always argue. I remeber this one time we argued because he bumped into a girl and said sorry to her, basic manners, yet i was still so jealous. I used to stalk his social media’s constantly, non-stop, all day; checking for any updated followers that was girls. I’d make him send me videos of his surroundings to show he’s alone, if i wasn’t with him.
How can I stop feeling so jealous and possessive in relationships?
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