I Am A Very Emotional Person But I Dont Show It

every time something happens that hurts me I get sad but I don't show it even though at nights when I'm alone I can't sleep or stop thinking how I could change that situation because I never try to hurt anyone but somehow situations change so fast that before I can save things I end up losing everything. I don't show it and I somehow manage to smile in front of others and I just think if I'm able to help people then why is there no one when I'm sad . The one thing I don't like to do is to hurt the people I like in anyway but they always hurt me