No she hasn't. Until she actually tells Tomo that she likes him romantically, there is no confession. Either she opens her mouth and say it properly or wait until Tomo feels the same way. Tomo has no way to be sure if Ibuki is just being a cool female friend or is in love with him. And I completely prefer that he doesn't assume anything, and let Ibuki makes the first move. I hate how the burden is always on the dude when it comes to taking the first step, in real life or in manga.