he has a girlfriend but when he was asked about his sexuality on an OF live (i think), he said he was not straight without elaborating.
Yeah he might be bi, but don't want to speculate. But he does always call the other divers sexy and are very flirty with them, but could all just be a bromance thing.
 
He rarely mentions his long term girlfriend on his OF & when he does he tends to refer only to his ‘partner’. He certainly likes to give the impression that he might be Bi, but I do wonder how much of that is him playing to his audience.