Trust!

Trust- the one thing that unfortunately no one can do peacefully in this world full with bad things, or maybe just bad people..
I always choose to trust, to believe in others, but lately it's getting very hard for me. I don't know why but kinda everyone lies. Even I lie. So how can I be sure that others don't lie to me, when even I sometimes  lie to others.
After lie, and lie, can we really trust that someone can change? Can we really be positive? Won't the thought of that they're telling us a lie haunt us? Won't we hurt our selves & others in that way?
I always loved little kids. I didn't understood why, 'till now.. I love kids, not because, they're cute an funny, but just because, they're always to innocent and honest. With them you can be always sure, that they're telling the truth.. I wish everyone could be like little kids.. That way nobody ever would get hurt!
After lie, and lie can we really see the limit between the lie and the truth? The limit between ordinary fantasy, and facts? Can we really notice the limit between good and bad?
So why are we living for? Our goal should be to grow up in honest people, who always prefer to tell the truth, and not to become, in something no one should..
So how can we trust that love isn't just a lie? How can we know that we aren't just dreaming instead of living? How, when in the world we live lies are just another ordinary thing, just like giving birth..