Please help me am going crazy and am scared i know its long but am begging?

Ok so when me and my boyfriend started going out everything went amazing.. Then summer started and everything is going horrible..we fight most of the times i know he has anger issues and doesnt know how to control it even thoe he is trying... But i feel like a puppet in the relationship i cant say anything bcuz it gets him mad and i dont want to get him mad because i love him so much... Also i work less hours now so i want to spend more time with him but sometimes i do realize that maybe i dont let him have his time... But i have this big fear that he is going to leave me or break up with me or even cheat on me but he promises me that he wouls never do anything like tht.i just need to know what to do because i dont want to fight but no matter how much i try he keeps gettim mad for everything i do.. Also i spent alLot of timw with his family but he doesnt spent really any timw with mine. We are in the process of getting engaged but am scared that everything is going to go wrong.. He is a couple of mOnths younger than me but way more imature but i really lOve him and i know he loves me so please help me please i know its lOng but i need help