First: You Get Butterflies
When you like someone you get butterflies. Meaning, you get all giddy inside and a feeling that sometime make you think you can fly. Well just because you get butterflies doesn’t mean you love someone, just means that you have feeling for them. But they are present during love.
Second: They are all you can think about!
When you love someone you consistently are thinking about them through out the day. You wonder what they are doing, how they are doing, who they are with. Also just because you think about someone doesn’t mean you are in love, you have to consider some other factors.