Me and my girlfriend have been together for five months and im still trying to impress her and am always stressing wether she does or not. Can you give me advice?

Don't spend too much time or energy on trying to impress her. She already said yes to being your girlfriend, relax and enjoy the relationship. Spend time planning how to do nice things for her, do stuff together, and cherish the time you are together. Don't put her on a pedestal. You can not spend the all your time and the entire relationship trying to impress her, and neither should she. Your relationship is hopefully something the both of you are in because you enjoy being around the other person. So relax, you have already impressed each other enough. Now is the time to be happy together, don't stress about it.

You know that you can't impress her all the time as it needs a lot of efforts and stress. It will eventually drain your energy and is already now. Instead of trying impress her, show her who you really are, of course little by little. Who knows, maybe she like the real you more than impressive version of you. Being yourself will make you feel lighter and no stress that you would be able to enjoy all the moments of you two together, smiling and laughing, rather than finding opportunities to see how to impress her. So, relax, communicate and connect.

Ask your girlfriend to do this activity with you: both of you write down what you like about each other. Exchange your list with her list about what she likes about you. Keep the list in your wallet and pull it out whenever you feel stressed out about impressing her. This is a good way to remember that she's already impressed by you. The list might even give you date ideas. If it's not too stressful, learn new ways to surprise her. For example if she knows that you don't play an instrument, learn how to play an instrument of your choice. It would be impressive if you serenade her when she had no clue you knew how to play an instrument. That would be impressive!