Family Crisis need serious help?

When I lived with my mother a guy used to consistantly call up my house phone consistantly a few months later my mother said that I should date this guy I was like no hes bad news a month later the guy said he met my mother one night and she met him in the car he explain everything about my mum and how she looked and mentioned some lewd things that happened between them. Anyway I dont no if it was true but at the time I belived him because why would he lie in such detail about what happened I asked my Mum she looked shocked and said he asked her to meet her and that he was the one trying it on with her. I dont no what happened but the fact she met up with him disturbed me at the time how did he know that I was dyslexic well my mum told him. I feel so stupid because I should of forgived my mum and left it as that I feel so horrible for not talking to her thats why I feel like a horrible daughter she gave birth to me and I treated her with contempt. But besides that went I was in a permenent relationship with a guy and where still together long stor but he asked me over and over again why dont you talk to your mum I said just leave it Im just not that close, but for a year and a half he kept on asking why dont you talk to your mother I feel so stupid but I told him the story of why I dont talk to her. (Now I realised I should of kept that to myself) anyways because of that in an agrument he brought up to my mum your a fake christian and I know about your daughters childhood. And I think my mum new that I told him and I feel so guily for doing so as thats my mother the one that gave birth to me and forever my horrible partner I dont even want to be with has that view of my mother and I just want to hang myself because of it. What do I do?