Does it ever let up?????

I haven't posted in a while - things have been a little better - but it never really stops.  I just don't want to be here anymore.  I even just graduated with my MSW - but i don't see how i could help anyone else feeling like this.  I'm so tired.  Never happy.  Well, once - about a few months ago on cymbalta, until it stopped working for me after about 3 weeks.  I can't even say how much I don't want to go on. My therapist gets really frustrated with me when I express this - says I have to make a life worth living.  I'm trying.  Even have a new relationship, which I guess is a good thing in my life - I just can't shake this - it feels so physical - I'm never ever happy - don't know what that would ever be like, and I don't think it's truly possible to achieve that.  Life has been more than hard - so much stuff.  Too much i think for one person.  How do you just keep going??????