Just feel like I'm not cut out for this world.

Trying to make a better life for myself, but it's very slow to come. I the oldest of 3 children in my mid 20's. My younger sisters are much more successful than me, much better in school and are almost guaranteed to be successful. I feel like I am a huge disappointment to my parents. I am still living with them, graduated from college, but worked for two years at the same part time job I had before. I just needed some time off to look at my options. Plus I got a little bit depressed but I am starting to get out of it. I am going to school again, but I don't know if I will make it in university. I will be at least 28 more likely older before I graduate and then much older before I get a career. At this point I have had a crappy social life, never been on a date and it worries me that I am still very anxious in social settings, to the point that it almost comes to an overload for me. This also makes me frustrated because I am a swimming instructor/lifeguard and pool supervisor for the city I live in, and I can teach with confidence. Maybe it's because I feel in control in that aspect of my life and not in my life outside work. I just feel like I'm doomed to have a crappy life one way or another.
Just feel like I'm not cut out for this world.
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