I am so bad at talking about my feelings it's not even funny. I'd Literally rather suffer alone than get someone else involved in whatever is going on in my life. However, this is really unhealthy and I know that, so i've been working on reaching out to friends more, and being more open with them. It's been hard let me just tell you, but it's definitely worth it. Here's a guide on opening up, when you're just not good at it!
The first thing you tell a friend doesn't need to be something big and dramatic. It could literally be that you still cry when you think about your cat that got put down three years ago (my secret), or simply that it is hard for you to open up to people (also my secret). This is about your comfort level, so don't worry about the big Stuff just yet.
TRUST YOUR GUT
If something is telling you that you should not trust a certain person with information, LISTEN TO THE FEELING. I told a friend all sorts of stuff because I thought that's what friends did, but I didn't trust her at all. Now we no longer speak and I hate her but that's a while other conversation. I knew I shouldn't have opened up to her, but I ignored that feeling and have regretted it ever since.
TRUST YOUR FRIEND
Unless you have a friend that gives you the feeling I mentioned above, trust them. If they are a true friend, they will support you instead of judge you. Nothing you say will push them away! Unless you murdered someone, but this can still be talked out (DO NOT MURDER PEOPLE)
TRUST YOUR FEELINGS
If you don't feel like you can talk about something yet, then don't talk about it. There's an urge to tell your friend everything, or for them to want you to talk about it, don't. You'll know when you're ready and then you can feel free to open up to your friend!