So I don't understand because I'm empty

I don't understand the thing about feelings, I do have feelings but I feel like I can't feel my feelings.
And so I just want to ask but
• Why do humans get emotional on small matters
• Why do we express our feelings
• Why is it so hard to say “I love you”
• and what is it about feelings that make me question my existence
(Because I feel so inferior)

And only asking because I'm curious,
but why are people so judgmental

I'm laying here contemplating my future and I feel a mix of fear, confusion, sadness, guilt, a dash of depression, happiness, anger, worry, and then I feel empty as if I shouldn't exist, which confuses me.