I'm searching for a shounen/(seinen), with martial arts. It should be about a boy who whants tp become stronger, but not for the sake to be just strong like in Veritas, but to protect himself or his friends. I don't whant him to look strong/ have muscles, but rather cute and a crybaby, someone who can't defend himself, but is unexpectedly strong despite his appearance, like in the Breaker, but not something like HISTORY'S STRONGEST DISCIPLE KENICHI. I want this manga to be complete and at least 5 volumes, preferably 10-20 volumes. Not have Ecchi, or if it has it isn't something one notice like in Ga-rei.

Have you tried Kenji http://www.mangaupdates.com/series.html?id=4448 I think it fits your description pretty well.

Yu Yu Hakusho
Ushio to Tora

they started doing the second series to breaker called breaker a new wave

Try Veritas

Never read it but i hear it's good

Oh also Change Guy very good though it gets a bit of a rushed ending

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There's no love in your violence.

-Kakihara

Ya , I second Veritas , it's quite similar to The Breaker .