I don't like my sil and doubt I ever will until the day I die
Why don't you like your sister in law?
She's a controlling bitch in almost every sense
It's fine if you don't like all of your family members, but you should still try to get along as best as possible. You will just cause more problems in the family if you don't.
Eh.
It's okay to be indifferent about it for now, but what about getting along for the sake of your partner? You are family, and I believe your partner will be proud of your efforts and appreciate you for trying.