Feeling worthless and not worthy of anything

It's come to my attention lately that I have felt this in the pit of my heart that I don't live up to my own expectations. It's unsettling. But I can't seem to get out of the funk of feeling just sorry for myself. Example of today. My boss asked me if I could come in today. I like my boss I think her and I are cool. BUT I was just not feeling it today also my stomach is a bit on the upset side so I just told her I can not my stomach is acting up. All she text me back was "Fine". Like she was just kind of done with me. BUT I try to remember that it's just text, I don't know how she was actually feeling on the other side of the phone. It makes me think to much though on this. Well what if I came in would I feel better, also extra hours but I didn't feel like it and I shouldn't feel bad for saying no. My boyfriend says it's cause I care to much. and it's definitely not that I don't want to care it's just I want to ... I guess keep the peace. It's hard sometimes though... but I try to remember that I can't please everyone and I have to start focusing on myself really. If I'm not happy what is that point. I guess back to the point of I suffer from depression and it's killing me from the inside out. I'm stressed all the time and no wonder my stomach is acting up. I just want to get out of it so bad. I can't live like this. It's horrible.... -Keno (I would add more but i'm just not feeling it...)