How can I get my girlfriend to listen to me?

You can only do so much, you tell her one time how you feel about something and that should be it, you don’t want to keep pushing the subject or pressuring her to quit something she doesn’t want to because it is controlling and it will cause her to not want to be with you. It’s really respect if you say you don’t agree with something and she continues to do it right in front of you then she doesn’t respect what you have to say…maybe it’s time to start thinking if she is indeed the right person for you…I have said this many times it’s not about love, you may love someone sooo much, but that does not make them the right person for you! It’s obvious that regardless of what you say she is going to do whatever she decides…I don’t know she sounds a little rebellious and I can totally see how it’s annoying because they think it’s cool when really it smells, it’s unattractive, and it’s very harmful to the environment and not to mention her body/health. Good luck, but I think you should give her an ultimatum and that will show you just how much she cares about you..like a test.