I'm sorry that your boyfriend hurt you so. That would definitely fire up anyone's anxiety.
When I start getting that breathless feeling, I try to concentrate on breathing deeply and slowly. I also tell myself that it's just anxiety, and it can't hurt me. Sometimes, that makes it stop, but even when it doesn't, I feel stronger afterward for having tolerated the breathing symptoms without panicking.
Co-Moderator, Anxiety and Panic Forum
DX: Anxiety, Depression, LPR (acid reflux)
Meds: Paxil, Nexium, Zantac