Because they are not looking for anything serious or have no clue that you want to be serious with them. Just a thought. If you see them on a consistent basis, ignoring you while chatting it up with others on here, then you need to find out why he's doing it and if you feel like he's going to continue doing it, then you need to find one who doesn't think that WebDate (or any other dating site, for that matter) is his life.