doubt

there is this one person that i can't seem to find reason to trust...
i can't find any reason at all to trust...
at all...

If you can trust someone, you wouldn't have doubt in the first place right? means, doubt came with reason right? even if you don't know what the reason is? so, i can't trust you...means there is reason to it right? just saying~

why why why so hard to trust you? why?