Why are you still married then when you are looking for someone else? When you got married to your wife, didn't you think she's the one for you?
I don't wanna be harsh cause I don't know anything about you and your marriage.. but saying something like that sounds pretty dishonest to me
They say these online dating pages can find a true match for you nowadays, but i have no idea if that works. But you should definitely do sth about it if you're unhappy. Either be honest with yourself and your wife, get a divorce [like someone already said here] and look for someone who you need, OR
realize that you might have been foolish wanting something you might never find... Can also be that you already have it.