No this ring is gorgoeous! And appropriate lines for a princess. Very purty.
Has your girl given you any hints about what she might want in a setting or are you just guessing here. If you are just guessing you might consider either asking her what she prefers or proposing with a plain temp setting and picking out a final setting later. Many pricescope posts from women happy to be engaged, not completely thrilled with the style of their ring.
Is this an actual ring you have purchased or just a picture? Is the picture of a ring with a 1 ct center stone in it (or something bigger)? I ask 'cause the proportions might look a bit different with a 1 ct center if this is a 2.5 ct or something.