How do you open up to your friends without feeling embarrassed?

Like I used to do it so easily but now it's so hard? Like I know they won't judge me for it but it's really hard not to be embarrassed bc like they know that about me now?? And my problems seem really trivial compared to some other things in our group. I really want to open up bc I can't just keep what I'm feeling inside me but at the same time it's just so humiliating and embarrassing to be emotional infront of them. I can't even cry infront of my own blood relation how the fuck do I be vulnerable with my friends? I've had someone notice I wasn't doing so hot but I couldn't even tell them that they were right. I'm just so used to not talking to anyone about it and dealing with it on my own.