Dont know what to do

2 years ago, maybe 3 my moms boyfriend came into the living room while i was watching tv n the sofa criss cross applesauce wearing these nylon shorts, he stares and points at my vagina and asks me if he can touch it and how its fat. ok. i was passive about it for awhile. didnt tell my mom..dont know why, but then my mom goes away to Cali and forget to pay the electricity bill, so the electricity gets shut off. i go to a friends house, while im there he sends me a dirty text message telling me that he wanted to borrow my shaven vagina and hit it from the back and that he"ll give me 2000 and that we can get high and drunk in our attic. i told my mom she made up excuses, then there was a he said she said about why the text was sent he told me that he was cheating on my mom and that he already told her then i told her what he said to me and she said that it wasnt true, that his friend was the one trying to send it to a girl. and then they both stuck to that. then i told her about the first incident and like it was crazy, she made excuses for him and then broke down when she asked me to swear to god she told me that she faled as a mother and that she knows it and wanted to kill herself she asked me what can she do to make everything ok, i told her to leave him and she replied with i dont want to ruin his life..... um yeah then we got home and i guess he knew that we were out talking about him so like as soon as he saw me he started crying and asking me why would i do that to him... like i had to tell him what he did to me and he said that he was drunk and didnt recall..so because of that i have to disregard everything else that happened, like him giving me weed, him acting perverted, him hitting on my friends and referring to them by " the one with the nice legs" and on top of that hes been raising my nieces. wtf