How do you know if someone really like you?

to like or to loveFirstly, You must determine whether you really like someone or you love someone.Liking is hoping they are having a great time with or without you. Loving is fearing that they are having a great time without you.Liking is having a good time with someone whereas loving is hoping they are having a good time with you.Liking is fun, loving is painful..

When you feel weird uncontrollable changes in your body that make you distracted from all other things around you, that is a signal from your body that it really likes the chemical changes that are a sign of love, not logic. So the answer is is, you never know it, but you always can feel it.
You think about them all the time, you care about them alot, you come up with any excuse just to talk to them and you may even sometimes catch yourself staring at them without even realizing it because your so interested in everything they do.