"I get what you mean but why did he tell me that if he wanted a relationship it would be with me?and then after he said "he has changed his mind and even seeing eachother is worthless he likes bad girls"?"

The little details don't really matter too much but I'll attempt to indulge you for a moment... Maybe he does like you but he's afraid of commitment. Maybe he's been burned in the past. Who knows? Or (sorry if this sounds rude) maybe he just wanted you to lay-off. Like, by implying that he liked you more that it would put your min at ease. You would be reassured and you would back off a bit just by knowing he liked you. As for changing his mind, did you begin to act differently after he said that? Like going after him even more, hoping that the relationship would go to the next level? That could have pushed him away 'cause his idea back-fired. I dunno.
Like I said, the details don't matter because regardless, he is clearly trying to push you away and you need to look at that big picture. I agree with others that you should move on. He sounds a bit broken and I think I can speak for everyone here by saying it's not fun being with someone broken. Don't try to save him or whatever. I know what that's like and you'll just end up hurt in the end. Move on before you get even more emotially invested and therefore more hurt. Good luck!