How do I deal with my dad's new girlfriend

I have been living with my dad for almost three years, we're not really that close still an there is a lot of un talked issues between us, we rarely talk. He has had other girlfriends before, it's not that I care really. But this lady he's been going out for a while really creeps me out. Since we met her she really tries to get her son, my sister, my brother, and I to spend time with them. Nobody really likes her, not even her son, but we're still polite to her. Except my brother but he's married and out of the house. Anyways they are basically moving in together. I am a really starting to freak out though because she just keeps trying to get my dad to spend time with us like we're a happy family but all my dad does is drink everyday. She keeps on texting me and following everywhere. I tried talking to her, I told her I needed my space. She started crying so bad and talking about how I hurt her feeling and I was not even rude when I said it. I told her she didn't have to try so hard for us to like her (she doesn't really get that we don't like her).She just kept on talking and she still keeps on stalking me. I swear I'm not exaggerating when I say she texts me like 16 times in an hour even when I don't ever answer her. I talked to my dad and he doesn't say anything to her. I mean not asking him to break up with her. I just don't want her in my face. She is so creepy! She is always telling me and other people how I'm so beautiful and I don't even know it and how much she loves me ("there is just something about MaChocolate). I've known her for like 6months and she says I'm her baby. She has red hair and she died her hair brown and told me she wanted to look like me. I'm keep telling her to leave me alone in a polite way so I don't cause anymore tension between me and my dad but she doesn't leave me. I really really try telling but every time she just cries rivers and it feel like I'm breaking up with someone. Even her son feels bad for me and tries to get me away from her. What should I do? I don't think I can stand two more years of this. What if she follows me to college?