A friend who I trusted did this, and left me feeling very angry and I cant trust anyone since, help plz!?

I seriously doubt the message you were supposed to get from that experience was "don't ever trust anyone again", but I wouldn't be surprised if it was something along the order of "don't trust just anyone with your property so easily". One approach is going to help you develop healthy skepticisms but remain open to legitimate friendships as they evolve. The other approach will leave you bitter and closed off, and unable to engage in healthy human exchanges when you should. Since most of life isn't an action movie, your best choices will be the sane ones that take you away from the prospect of having to fight your way out of them. (It's not too late to rethink your present heading and change course. One question to help you along the way: When you're being closed off, who are you really punishing here....your one-time friend who you wound up having to fight, or yourself?) You rightly decided you were among the wrong group, and you made suitable changes. That was enough. Closing yourself off to everyone is clearly overcompensating. Don't.