Wanting a Mom

I feel so ashamed because my mom could never be one and I'm constantly sensitive when I see kind, attentive, real mothers. It makes me cry because it kills me that I never had that and never will. When someone else's mom cares about me for a sec, I get upset because I like it too much. I hate my life. I wish I could make the feelings stop. Idk how to quit wanting a mom and being so sensitive. I'm freaking 25!!! -_-