Is it a real relationship?

Me and my boyfriend have been going out for 5 months now , everything is going great he's very caring , makes an extra effort with me all the time and were living together as well... But I see his social media he follows a lot of females who are half naked , he said to me they are his friends and most of them do onlyfans as a way to get extra cash... What I found weird was he was liking a lot of their pictures like almost all of them... from half naked pictures to literally nudes of them... I wouldn't have really cared if he didn't know them and they were a pornstar for eg , but he knows them and it makes me feel really weird ,
He's also been talking to his female best friend recently , like almost everyday from really early in the morning to really late at night?

Should I be worried or not?
Is it a real relationship?
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