How do I know I'm making enough breast milk since my breast don't seem to get full no more

is it because they don't feel full to you?

They just feel super soft and not ferm

My left breast is soft and doesn't get engorged like my right breast but my son is still able to get milk out of the soft one

Go by your baby's ques, if baby isn't acting hungry after a feeding your fine. Them being soft and not full feeling just means your supply leveled out and knows how much to make

Ok

http://mythnomore.blogspot.com/2010/11/breasts-feeling-full-good-thing-myth.html?m=1 this will help you allot lol my son is 9months old and i thought bc my boobs are soft all the time that i had no milk but its actually the opposite it means your milk is worked at peak performance.

That is totally normal. You only feel engorged at the beginning unless you go a long time without nursing. Your body gets more efficient at making what you need when you need it.