You sound like I did some time ago.

People Lie. People use. People get bored easily.

Not all people. But you can only get lied to, used, and tossed aside so many times till you just had enough, and no longer have the strength to put your chips back out on the table.

I hope you're not at the end of your rope. If you are, then sorry you are, and hold on tight before you do fall too far.