Your "friend" who rattled you out is a total dickbag/bitch. I hope you have cut ties with him/her.
As far as obtaining a firearm from an FFL, is it possible to travel to a different city or place and then purchasing from one that doesn't know your identity? I assume in your state you should be able to obtain a firearm (especially a long gun) if you pass a background check and fill out the firearms transaction record (Form 4473). I assume you never gotten involuntarily committed (you went voluntarily to a psych ward) or am I wrong?
Alternatively, maybe the gun show loophole might be another option to consider should you be unable to obtain a firearm legally or through an FFL.