If you think you might be depressed maybe try the St. John's Wort. That's what was suggested to me (although I don't do a very good job of taking it.. ).
I don't think I'd let it go any longer than 2 weeks in contacting your B. If you don't want to after the first week in hopes of him contacting you first then please don't wait any longer than 2 weeks... 3 weeks may not seem very long but it's nearly a month.. and I worry that before you know it another 5 months will have gone by.