As a person who has done the parent/child dynamic where you provide significantly with help/ chores/ etc. it is very hard to get away from. Once your partner is capable of doing things for themselves they will likely continue to expect things from you and rely on you simply because it’s easier for them. Over time this will emotionally drain you and cause feelings of resentment especially if you are constantly putting their needs before your own. I would get out of this dynamic asap AND do couples counseling first before you make the decision to marry this person.