Aw, you poor thing. I've been there. (And still there to some extent).
Sometime it takes time to find the right meRAB. I know it's hard but you have to be patient.
Are you seeing a psychiatrist? Is s/he a *good* psychiatrist?
That has helped me a lot.
I'm taking Luvox WITH Wellbutrin--I am on 300mg of Luvox and had the same problem, but when I added Wellbutrin my sex drive came back.
Are you on the pill? Because that killed my sex drive, too.
As for the boyfriend problem, does he know anything about the anxiety? I don't know how far you are into the relationship, but assuming you've been together a good six months or so, just bring it up in the most straightforward, simple way that you can. You don't have to get into too much detail, and of course you don't want to overwhelm him. But just say you have issues with feeling stressed or worried, and you're working on it and doing your best to get better. All of us have things we think our bf/gfs won't like, but if you guys fit well together, he'll love *all* of you, anxiety and all. I'm sure there are skeletons in his closet, too.

good luck!!