A black belt in TKD means absolutely nothing. Every parent I know enrolls their kids in TKD and they all have black belts. I saw an eight year old with a black belt yesterday. It means nothing. In all honesty it sounds like your training is absolute sh*t. I'm not trying to be a dick, but it sounds like sh*t.
Fighting an MMA fighter who has training in Boxing and BJJ will be a huge challenge. He knows what he's doing and he doesn't care where the fight goes. I honestly believe he will kick your a$$. After your receive your a$$ beating, feel free to email me to tell me how it went.
edit: @Chris, you clearly have no clue what you're talking about. Especially your little rant about Bruce Lee. Bruce Lee wasn't against the sport aspect of martial arts, in fact he's highly regarded as the father of MMA. He was against the dogmas of traditional martial arts like the ones you seem to support.
And BJJ sucks?
http://www.youtube.com/watch?v=VQXlg7DksvY
http://www.youtube.com/watch?v=JjK0g-cDJI4
http://www.youtube.com/watch?v=Fi1Ao51Pw2o
http://www.youtube.com/watch?v=iEnuHYRP0iE
http://www.youtube.com/watch?v=mHkxF7658pM
http://www.youtube.com/watch?v=o1FRjm_7zhM
http://sports.yahoo.com/mma/news?slug=ycn-10791647
http://www.mmamania.com/2012/9/7/3300137/renzo-gracie-muggers-twitter-ufc
http://articles.ivpressonline.com/2003-08-02/jiu-jitsu_24213349
Yeah, keep telling yourself that homie.