I'm finding it hard to trust my own good friends nowadays?

im always there for my friends when they need me, when theyre going through their own emotional problems and sh*t. always extending a listening ear and lending a shoulder to cry on. but when it comes to mine they just dont listen. they always revert my situation back to theirs. just yesterday i was there for a friend who was going through a breakup. i helped him through while he was crying and everything and suddenly he turned against me saying that i dont understand what its like to go through this bcos my ex didnt reciprocate my feelings. in my mind i was like "what did you just say?!?!" this was a VERY touchy subject. my ex was the one who actually sent me into depression and our story was very complicated. and just bcos i didnt ramble on about it doesnt mean you can make assumptions like that. even the rest of our friends there were quite taken aback. what possesses people that you trust and know for so long to do things like this, i dont understand?