To make your phrasing more interesting, choose one note that you think is the most important in the phrase. That note should be on a first beat or sometimes on a third beat depending on the time signature (in 4/4, the 3rd beat can also be a strong beat but the 1st beat is usually stronger) . Make a crescendo towards that note and a diminuendo afterwards. You can also emphasize that note with a small accent or play it slightly longer. Sing the phrase in your head many times to have a clear idea of what you want to do and then reproduce it on your instrument . This will give a good sense of direction to your phrases and make your music more interesting for you to play and for your audience to listen.
I am associate principal horn of the Singapore Symphony Orchestra and the author of the progressive methods. I'm happy to share my experience as a horn player and teacher with you.