Glad to hear that you took a positive step on the volunteer front - assuming you needed the break. I'm sure you can help contribute in other ways if you like.
Regarding the jealousy and insecurities, have you ever spoken to a counselor about these things? It's perfectly OK to do so if you need help dealing with some of those emotions. Alcohol of course is the worst possible thing you can do in these types of situations as it makes the depression worse, I hope you can get rid of what you have.