My friends are always asking me for advice...

I love my friends, don’t get me wrong, but sometimes I feel as though I’m their counselor rather than their friend. We go out and have fun, but it seems like any time I’m having a one on one conversation with any of them it’s always them telling me all their problem (sometimes about problems with our other friends) and expecting me to tell them what to do and how to handle it. Then of course I’m sworn to secrecy and have no one to vent to myself because then I’d have to spill things that others have told me. It’s getting tiring but I don’t know what to do. I kinda want to tell them to stop dumping their problems on me all the time, but I am the more reasonable one out of our group so I do understand and feel bad telling them not to talk to me about stuff. What would you do?