According to your problem analysis, you and your girlfriend have many differences in personality and hobbies. You may think that some of her behavior habits are not suitable for your principles, and you want to assimilate her. First of all, you should realize that everyone has a personality. If you want to assimilate her, you should influence her with your words and deeds, and you should evaluate whether it is right or wrong after every word and deed, and also explain where it is right or wrong. Comment on what she has done in time, but pay attention to her words. You can't tell her in the tone of an educator that you are just discussing the same problem.