in love with my best friend

I really need some advice , he's been my class mate for 3 years w spend hours a day talking on facebook , we get along very well. So he doesn't talk to girls that much since he's quite I'm the only girl he talks to a lot but sometimes he doesn't reply and we spend months without talking but when we do its like we never even stopped . Even if it's been 3 years but he still remembers our very first conversation and a lot of stuff i told him he's like hot and cold at the same time . I have no idea what to do every day is worse than the day before what should i do ?? Help me please

Is there any chemistry between the two of you? Can you tell if he's attracted to you at all? If you think that he has feelings for you, then tell him you'd love to start spending more time together. Go on dates etc.

However, if you think that he only sees you as a friend, then it's time to work out how to move on.