To true

Sounds accurate to me.

I think you're lying.

1.) Not true, honest people can have a paranoid mentality

2.) Fallacy - obviously people whom blame others for being dishonest are being dishonest!

3.) Not true, people whom feel inferior, or have insecurity issues may think they're being cheated on.

Sometimes, these assumptions turn out true, regardless of the assuming one's trustworthiness...!

Now, which are you? 

Or are you being accused of something by a girl....! If that's the case....well, good luck! Been there (even when innocent)

Ah yes, understand now... I agree. That's why I avoid any possibilities of finding myself in a situation like that, you should too!

yeah done! i'm the liar and cheater.. of my self

You are so right. Avoiding this will be the best

What is this nonsense that you're trying to push towards people? You're basing these conclusions on how many scientific studies and researches? I'm assuming zero.
What we have here is a obvious case of faulty generalization. Even if you've encountered a few individuals that fit the criteria, that does not mean that everyone who is lying and/or cheating does it for the same reasons. I know some people and have witnessed them both lie to and cheat their partner. Neither things were caused by anything that you've listed.

You do have to clarify something to me. Are you talking about lying and cheating to a partner (e.g. boyfriend, girlfriend, husband, wife, etc.) or in general? I've seen people make up unnecessary lies just for fun.

CPNpr is a scammer and these are his sock puppets:
xgold, deadlock1, Speedball, Susi.D, mltask