I feel really sad

To
Not sure if its cause i started my period yyesterday...hormones and all but i feel so low. My partner doesnt show me any affection all i get is "can i get a blowjob" ... past experiences with him such as the time he sent a girl from work dirty messages ... a lie he told a few years ago. Things bothering me years after they happened. I just feel like running away. I have become estranged from my mum since February and she told me she wishes she had aborted me and my sister and that by me becoming pregnant 8 years ago at the age of 16 that was a burden on her. My sister is amazing. However she is married and had a baby in March and is always busy... i understand that. I feel so fucking alone. I have nobody to confide in about all of this. My friend lost her baby 3 weeks ago and then her Mum right afterwards .. so i dont want to talk to hee about it. I just dont know what to do.