Holy fuck dude, please stop. Clearly she doesn't like what you're doing and you're doing it anyways. Forcefully undressing her? Forcing her to do what you want with the threat of breakup? This is incredibly manipulative behavior. What kind of right do you have to decide if she wants to dress in jeans and sweatshirts?

If you love this woman, you need to apologize right fucking now, the things you've already described are incredibly bright red flags. Seriously, it is wrong to keep treating her like you have been.