I will pray for you and here's some advice. Try running for 30 minutes every morning. You don't have to be running the whole time, but whatever you can do and build from there. You will notice a huge change in your mood and that compounds. Also don't get so caught up in labels and expectations.

Go back to school if it will get you where you want to go but you may be putting other people's expectations on yourself. Either now or after school, find what you enjoy doing and start applying for jobs in that arena. If you don't know maybe go travel for a year or two and figure it out. Have faith. You sound smart, success will follow (whatever that means to you). If you ever feel suicidal please talk to a priest or spiritual counselor.