Does a controlling relationship get any better possibly when married or in future?

i been with my boyfriend for about 5 years now at first he was very nice and sweet and caring then soon we intro our partners to family and then official.

So he is very controlling always calling me well too much texting me a lot where i am what im doing. He was hurt in the past so i just deal with it so he knows i am not the same and i do love him but i did a stupid mistake i fallen for someone else soo much nicer and easy going i did hug him and said i liked him but i can't leave my boyfriend.

Me n my boyfriend went through a lot esp me. He goes through my whatsapp sneakingly and stays over and has all my passwords to my account for couple of years naw and this new guy i feel so different with him but we can't talk so i cut him off.

I dont know if it was worth it? But he is a very jealous type my boyfriend he even argued with my own mates on my insta replying to them when its my account!

I don't know and we still together just on and off he always breaking up with me n then back why? shouldn't it be me😂☠️?

He might ask to marry me i dont know if i want to or should i. For us Asians its very imp to marry but i can choose who to ofc its just that i spent soo much of my history years with him but it isn't going well

will it improve?
Does a controlling relationship get any better possibly when married or in future?
Post Opinion