Translate.
Talking to her: I do radio magic. It turns out that it is quite possible to broadcast radio waves with a horn. Right into the heads of other ponies too, if desired.
There is a reason for the “tomato juice” button. Haven’t you seen it?
Making eye contact: ?
Petting her: Dec, that’s enough! Someone will see us…
Complimenting her: She ate a carnation because PONIES EAT FLOWERS, THAT’S WHY
Saying you love her: And I love you, Dec.
Saying you want to get married: Yes… Yes!