Oh wildberry so sorry you are feeling so low right now. When I was at a low point I used to take a city bus from a stop near my house until it came back to the same stop. It got me out of the house. I didn't need to really talk to anyone and it just started to get me out. If you can possible get out do it. The walls come in on you fast. Even if you are feeling bad this takes little effort and it really saved me on some days.
It sounds like you know where your point is and that you don't want to go there. Avoid it at all costs. You are strong and can do it.

The BF sounds like he is worried about burdening you too with his own problems. Maybe some time will help him to see how much your friendship means to him. Don't give up.

If you are worried about the blue in your arm and redness in your neck area a call to the Dr. may be necessary..

I will keep you in my prayers sister. WE care in here and will be here to help you through this.