How do I 'man up'? (without faking it like I've been doing for about 4 years)

I take offense over little things and I constantly live on the edge of my emotions, I do not like it, I hate myself, and this is one of the big reasons for that.

Can anyone relate being very sensitive here?

I've always been an outcast, or moreso maybe felt like one. No one ever related to me in high school and college. Because of my very sensitive nature, people would stay away from me and I'd get bullied a lot.

Can anyone help me out with this?