Am I wrong for not forgiving my father and his girlfriend??

Alright so I didn't see my dad for 11 years. When I was 15 I reached out to him. Biggest mistake of my life. A little back story when I was 4 years old his wife would abuse me and her son's from a previous relationship raped me and my dad didn't believe me so that's why I hadn't seen him in 11 years. His new girlfriend I absolutely do not like. When I was 15 he would call me talking about how he was going to kill himself multiple times. So when I was 15 I ran away and my mom found out I went to see him and threatened to call the cops on him so his girlfriend texted my mom calling her a bitch and "whore. Like mother like daughter" and my aunt passed away in 2015 and she was jumped not too long before she passed and my father's girlfriend said " too bad they didn't kill her". Am I wrong for not forgiving her?

Update: my boyfriend works late so I was at my aunt's house and my dad and his girlfriend were there so I was civil and nice and whatever. So when my boyfriend came back I was upstairs coloring (trying to distract myself from my thoughts) and she asked him where I was and he said upstairs coloring and she asked him if I was a tweaker because I was coloring... I don't do drugs like that. Never have. Never will. Lost too much to them.