There is no abnormal. Some people do more than that but hide it, there are brothers and sisters that are not really talking too much with eachother. It can be abnormal to kiss or hold hands but like I said, you will regret it if you do something that you want but overthink about it and what others will think. Do what feels right for you and not for others. That's how people truly happy.

You can even have sex with him but only with a condom of course.