This is probably the hardest statement because they don't control your feelings. The eye-rolls, smirks, etc. show a lack of respect.

Here's one way to show the things you are looking for:

The Greatest Compliment You Can Pay Your Sweetheart

https://medium.com/the-ascent/the-greatest-compliment-you-can-pay-your-sweetheart-2956fcd9700f?source=friends_link&sk=8bee2f80154ff1e52607d1b96c94c8d3