Tell him you don’t care that he already thinks you’re pretty, it’s nice to be told and you’d like to hear it sometimes. Also the word “I love you” well no shit I love you, you know that, but I still say it. Tell him how much it means to you to have that validation, that acknowledgment.
And yes knowing each others love languages (and him knowing yours) makes a big difference also. His is a acts of service, quality time mine is also quality time but w physical touch. He had to learnt to touch me the way I wanted over the years since it doesn’t come naturally to him.
Sounds like words of affirmation might be one of your love languages. My hubby and I both read the 5 love languages book a few years ago. He enjoyed it and it really helped us talk through what each other needs to feel loved - highly recommend!