how do you know if you like someone

There is this girl, that I know likes me but I don't know how to feel. I've always pushed feeling of liking people down because I thought I would never have a chance, I've gotten to a point to were I've just always pushed down the slightest feeling of attraction. Its to the point I don't know to feel ( in my best words ) " love " . What are some signs that I may like this person? ( sorry for the bad wording I just don't know how to word these things. )