If a guy likes you and then for some reason he stops how can you know if he still likes you?

I think "like" is the operative term here. If he stopped liking you then he may still "like" you but not with the same attention and intensity of the previous relationship. Sounds like he is moving on. He probably won't be mean, and he has no reason to not like you, but this is now more of a friendly relationship. Don't be dismayed when he soon puts another girl ahead of you. You should find another guy to "like." If you dont know why he stopped liking you once how will you tell in the future. Im sure he would make it known if he did. Subtle hints like wanting to be near you in a group. Looking at you and making you feel like your the only one in the room.. If you need to know now, just ask.