I cant fall in love

I love all romance mangas but I never feel anything for the guys and girls I know, when i'm reading a romance book I feel happy for the characters as they realize thare feelings and sometimes my heart thumbs like thares but I don't have any sort of romantical feelings for people. I think some guy's are cute but I don't want to date them and I don't really feel butterflies around curtain people. I know love and relationships don't happen like in most mangas but do you know why I feel this way and do you feel the same? Do I just need to wait a little longer?