Don't know

I don't know what I can do anymore. I feel like there are none of my friends I can trust. Whenever they are pissed off about something, I sit there and support them and try to be a good friend. But I feel like everytime I'm upset about anything I'm told I'm being a baby or behaving childishly. Something like that happened earlier today. I got upset at someone and went off to take some time on my own. Then I was confiding in someone I thought was a good friend about how I felt and why I was upset. When I came back later I found out that friend had basically betrayed my trust and relayed what I had said in confidence. And now I'm upset again because of what he siad to that. If I can't trust my closest friends I don't know who I can trust. There is no one left to confind in. I can't even tell the friend how I feel, becuase I know she'll just say I'm behaving childishly again.