(((Julie))) You sound like you are in a lot of pain right now, and I wish I could be there to support you through this tough period in your life. Keep in mind that it's just that - a period - and will end soon, one way or another. There are a couple things I'm hearing that you might try addressing to help you feel better:
~Depression really really sucks (I know this!!!!), so you have to address that actively, not passively in order to get some relief from it. That's so so SO hard to do from the bottom of the pit, but if you take baby steps then it's movement towards alleviating your pain. Depression is the absence of that movement - don't let it drag you down! Even one little thing can give you mastery over it: getting up, getting dressed, going to work. Give yourself kudos for what you're doing despite feeling bad!
~I'm also hearing a lot of anxiety surrounding your new job. Your identity has been messed with (one of the BPD characteristics is an unstable sense of self), and it's really scary to be jerked away from your "image" identified with one work source, and to be reinstated as a totally different person at another. You're going to have to work on separating yourself from your self-image as a grocery store worker. What things ARE you that are not related to your job? What things do you like that aren't related to your job? Would your life end if you didn't have your job? Try to identify with things (maybe a god or a spirituality) that isn't related to your job and depend on it for your identity, or even better, depend on yourself for that identity. Draw pictures of yourself as you did as a kid, imagining yourself as an astronaut, a doctor, a lawyer, a bricklayer. Find a "safe place" in your mind, and go there. Actively make some friends at your new job. Be empathetic to their problems and disturbances - identify with their struggles. Be empathetic with your bf, and do something nice for him, just because.
These are just some ideas I have. I hope that you feel better soon Julie

~Merry