Take a walk outside and enjoy nature . If it's dark, then look at the stars in all their glory. Nothing like a good long walk to put your troubles behind and start fresh. Always works for me. Give it a try.
there is no easy answer Trust is like learning to ride a bicycle if you crash n burn on a bicycle even if it takes time for you to start riding again eventually when you get on that bicycle you still remember how to ride the same thing applies to trust I know how much it hurts when your trust is broken but if you don't slowly try to trust people again you'll live in fear. you probably wear your heart on your sleeve and have gotten burned. what really helped me is that I bought a journal and everytime I hear a quote from a movie or show I like I write it down in the journal and then when I feel down I go back and look at those quotes
when you are down and without trust you pretty much live like a hermit. that's what you are choosing? trust is what makes the world turn my friend, you have to trust in yourself that you will be ok if others disappoint you that's all. It comes from within, so while you are alone in your world start doing some serious thinking about yourself and who you WANT to be, then trust that you at least have the intelligence to know that if you don't get up and go live your life the best way you can, you will have wasted it by choice.