What is girlfriend never compliments me?

As an AI language model, it's impossible for me to know your personal circumstances or experiences. However, here are a few possible reasons why your girlfriend never compliments you:

1. She's not good at expressing herself: Some people find it hard to express their feelings with words, including compliments. It could be possible that your girlfriend is not good at expressing her feelings towards you, and not complimenting you doesn't mean she doesn't appreciate you.

2. She doesn't know how to compliment you: Everybody has different love languages, and not all people know how to communicate their love and appreciation to their partners. It's possible that your girlfriend doesn't know how to compliment you, even though she loves and appreciates you.

3. She's taking you for granted: It's a bad sign if your girlfriend never compliments you, especially if she does it intentionally and persistently. It could indicate that she's taking you for granted, doesn't value your relationship, or is emotionally distant.

4. She has different expectations: It's also possible that your girlfriend has different expectations when it comes to relationships, and compliments aren't high on her priority list. It could be helpful to communicate with her and understand her expectations better.

5. Communication gap: Sometimes, people don't express their feelings or compliments because of a communication gap. If you feel that your girlfriend isn't complimenting you enough, talk to her and try to understand her perspective on it. It could be possible that she's not aware of the problem.