oh honey...you have BB, you have all of us here to cheer you on. Whatever choice you make.
It really sounds to me that you WANT to Bf, whats the harm in trying? like you've said, 6 weeks...then who knows. If your DH isnt going to be supportive dont ever forget you have us here, have you attended a BFing class? maybe get in contact with the ABA or a local group, so you have some "real life" support as well.
Good luck with whatever decision you make. I think you know your self well enough to know which way your mental health is going, you can always change things later on. xx