Is ridoc in fourth wing gay

Ridoc is also bi, if I remember correctly. Makes mention of him being with a girl earlier in the book and then an older guy at the academy.

Ridoc Gamlyn is a dragon rider in his second year at Basgiath War College. He is in Second Squad, Flame Section, Fourth Wing, along with Violet Sorrengail, Rhiannon Matthias, and Sawyer Henrick.