Need a bit of advice

Hi

I have recently been told I have depression, I've always suspected but I'm a subborn person who does not like to admit I need help.  I've told my partner but nobody else and I never discuss it.  I'm on prosac but worried about when I eventually come off it because I might go back to how I was.  I started exercising because it might help but I'm constantly feeling guilty for having this depression as it stressed my boyfriend out when I explained I had it so I did not tell him I am on prosac and my parents do not even know.  Nobody else I know has this so I can't talk to anyone.