I'm facing the following problem:
I started software development internship year and a half ago, I've passed the internship and now I'm full time software developer. The thing is my company has zero development over the past year and a half, my company lost a lot of projects and employees. My career got stuck, I'm not developing my professional skills or anything else because I have almost no work to do. I have very low salary and I want to change my job (not only because of low salary, but because I want to chase my career). I'm feeling guilty to quit my job, because my boss gave me a chance with the internship when I really needed it.
I've been to few interviews and got very good offers, but I'm feeling afraid/anxious about telling my boss that I would like to leave.
How can I overcome this fear and sense of obligation (resulting from being given a chance by my boss)?