How to cope with not being able to have time away

My daughter is 17 months old I'm a single stay at home mum living in my parents home. I have only left my daughter on her own with my parents the longest has been 2 hours to go to the cinema. She is constantly around me and I have been feeling so burnt out and overwhelmed recently my parents are not open to babysitting her at all so I'm a bit stuck on what I can do to just take a step away from her. My anger towards her has being building up cuz I'm not a single mum by choice her biological father was violent and I knew it was not safe to be around him I do not co parent with him either as I decided not to put him on the birth certificate. I also feel so much angry towards him as he has so much freedom whilst i do the hard work in looking after my daughter. I just don't know how to stop constantly feel like my life has been taken from me I'm only 22. How can I move from all of this and feel mentally better so I can look after my daughter better?