Harry is definitely straight, (even the username of his private Instagram account makes it obvious about his preferences). I don't think his interactions with male friends prove anything at all. Tom Holland used to bring his friend Harrison everywhere with him during the Spider-Man promotions years ago and many people used to think they were obviously gay because of that but it turned out that wasn't the case. Harry does this too, he has two best friends and he brings them with him everywhere he goes, one of them was in Miami with him recently (it's the one who was driving in those car videos recently) and the other one is the one they call "Malfoy", that friend was with Harry and Tom Taylor on vacation in Spain two years ago, even though some people thought it was just Harry with Tom alone but that friend was with them as well and sometimes Harry also brings"Malfoy's" brother with him too. Those are genuinely close friends and nothing more and Tom Taylor is no different, he's just another friend Harry recently made. I don't know anything about Tom Taylor's preferences other than the fact that he also used to like pictures on Instagram of the same onlyfans girls Harry follows, but I don't think he and Harry are more than friends.