Why is my boyfriend like this with me like it's kinda cute but I don't know?

Ok my boyfriend does so much for me when I want him to or just whenever he’s gonna get food he buys me somthing to eat an he will make me something to eat he went an saw new moon with me at midnight when it first came out he’s amazing to me an I love him so much but the thing is he gets so jelous an over protective like me an the guy friend of mine were in tHe living room at a party an he wanted to wrestle with me just playing an he picked me up an threw me on the couch an I told my boyfriend what happened an he got mad at my friend an mad at me to then we made up later that night then went to a party together an my guy friend showed up an tried saying sorry to my boyfriend an my boyfriend said you might wanna go away now or your gonna get hit real quick! An he threatend to strangle him if he touched me again lol he’s not crazy haha but he gets so mad when I’m around other guys an thinks their gonna flirt with me I don’t know why is he like this ??