I'm am from a family with a history of mental illness, and recently (past year or so?) I've had brief thoughts of killing myself due to an inability to see how I can keep progressing in any meaningful way, and a fear that I will waste every gift I've been given and ruin my life while my friends and family move on without me. I've been feeling increasingly removed and distant emotionally from my family, which I'm normally close to. I don't want to die, but I couldn't keep going with the knowledge I had all the chances in the world of success and wasted them all. 
Is this normal? Should I tell my therapist?