A lil sad over here

Once again, I got trolled by my friend.
Always like that, trusted, believed and ended up I'm the one getting cheated, bluffed, hurt or whatever you called it.

Once people told me I'm gullible, I'm those who easily trust people and believe things or people easily. True that.
But I thought trust was the most basic thing between people?

Im not angry for him lying to me, but why am I always getting from people lying to me, even if it's the least serious lie.
Why I always believe people so easily, when I know that's my weakness.
You may think its a small joke, but it kinda relates to me in many aspects.
You, you, you and your lies, make you a liar.
You said you will, but you didn't.
How silly am I to believe that..?
Clinging onto hope that all that you said would come true eventually.

I can't go on like that or move on like that. I don't know what to expect from anyone or everyone now, totally hopeless.
That's the state I am now.

Who to trust or believe now?