trying to leave!!

so i met my boyfriend online through facebook about 2 years ago, i left my family in texas to come to chicago to be with him..hes sweet and everything and we have a 1 year old already a blessing of course but his mom is a total bitch, and sometimes his little sisters dont give me any respect and the lady is just trash. i live with them and try being nice and biting my tounge alot. she always has something rude to say and its just hell living with her. we got into an argument a few days ago and i told her i wanted to go live with me mom again in texas because here i am not stable and not doing nothing with my life and she got mad and told me she will try to take the baby away because i am an unfit mother ...i dont smoke marijuana anymore or do any drugs she just says i am unfit because im a little messy but come on who isint ?? im planning on just leaving by secret and my bd agrees with me he will notarize a letter saying i can leave with the baby..am i doing wrong for wanting to give my daughter a better life away from abuse and the gettoh?