Is theo being real or just pretending...

Okay so I've been reading a lot of posts about him here specially after that instagram comment incident people started talking more about him. Honestly when he first came in the show he became my favorite cuz he was such a fun and a nice guy and seemed genuine to me compared to the other guys. His chemistry with sian during the initial episodes was good and i really liked it. Then as the episodes went on and sian started going to paradise with other people and they didn't spend much time together i felt bad for him. Now that I'm reading other people's opinion on it too I've realized this too that it might be all acting. I didn't notice all this at first but it is a 10 days show and how can he only like herr in just 1 day after seeing her and he didn't try to approach any other girl. I don't think people can really fall in love so quickly so it might be true that he must be putting on an act or something maybe after all He's an actor. He's not a bad guy or something He's a good person and not just him but almost everyone has put some or the other act i feel. I wanna hear everyone's opinions on this too please share it with me in the comments what do you'll think about it ??