I don't know how to tell someone how I feel about them. How can I get better at expressing how I feel?
Let's just start with being real. Expressing yourself is vulnerable, and being vulnerable is hard. It takes courage and work to be vulnerable. My guess is that you have been shown in your lifetime that being vulnerable (ie, expressing yourself) is unsafe. My assumption would be you have been criticized, or ignored when you have expressed yourself in the past, it has taught your emotional self to simply not do it again. This is a normal protective mechanism that you have used to cope with past feelings of hurt. It will take time and work to engage again in an emotional way.I would start my practicing and identifying how you feel to yourself. Check in with yourself multiple times a day to gage where you are at emotionally. After you feel you have a good grasp on this, start to engage in emotional conversations with others. Choose others that feel safe to you, a good friend that knows you well, or a sibling or family member. Expressing yourself is a behavior that you have suppressed out of protection, so you can choose to engage in safe emotional expression behaviors just the same. Best of luck!