It might not be what other people experience, but that doesn't make you weird or a bad person. :)
I don't want to strongly say that it is normal but in my opinion, it is. My definition of normal for this topic is that I'm sure a lot of people experiences this as well, including me actually! I never really thought about it much but I suppose you don't have to dwell on it^^
I don’t think it changes anything, everyone has preferences and if you aren’t into relationships, then you aren’t into it.
There's time where I like someone but not to the point of having a relationship, there is also time that the person I like suddenly confess to me but I don't feel happy and I started losing interest. It feels like I like them but I don't want to like me. I search a word that describes my case and it is "Lithromantic" am I normal?