I don't know what's wrong with me!!!?

Sorry im typing on the ipod ....I have two close friends the thing is they I only have them and they have many other friends even though I know them too I always shy away when it comes to all of us plus them hanging out I guess because I don't know them well they are friendly but I just font know what to say or talk about with them it's really sad and my two close friends always have loads to say to me because they have many friends therefore more interesting things to talk about while as j have nothing jntresting to say my mind hoes blank even if I desalt want to talk to them if not for them I fouls be a loner in school I don't know what's wring with me snd even if I wanted to talk to the others I have nothing to say and it's been a while and if I suddenly start talking to them it'll be weird they usually ask me why sooo quiet and I just mile snd say tierd j have a headache or I font have anything interesting to share I remember even when I wad in primary school this happened I've never had a group of friends just a few and they get fed up with me what's wrong with me I here this it's also affecting my attendance sometimes j avoid going to the canteen if the other friends are going to be there I only go if it's just those two I make a excuse saying j have work to do on the computer djilesd I'm secretly hungry....,.,