Kelly, You are not a bad mama at all! Think of the head start you have given you lo in life. But I can relate to what you are going through, I think most bfing mamas have been there.
{{{{hugs}}}}
But, as you said, it is likely just a phase. I know it's impractical to go into his room, etc, but the phase likely won't last too long, but it's really hard to say as each baby is different.
Have you tried nursing with a nursing necklace on that your lo can play with it?... lots of mamas say that works. The only thing that seemed to work for us is to elimate the distractions. So to the bedroom we went, but it passed. He still gets distracted every once in awhile and it's back to the bedroom, but generally he's much better.
I'd give it a bit before you go to bottles, give him a chance to organize all the new things in his world and he'll be back on before you know it.
Hope that helped.