Medium-long hair--eww mullet trouble!

Ahh this is my third post and they keep getting deleted... I will make this short now.

I'm a 17 year old guy and trying to grow out my hair like Matthew Mcgonahue or whatever his last name is:

http://i7.photobucket.com/albums/y298/meandjohn/matthew-mcconaughey-050-img.jpg

Here is a timeline of my hair since around June 20th:

Week after haircut:
http://photos-331.ll.facebook.com/photos-ll-sf2p/v82/193/91/1331550331/n1331550331_30139801_5163.jpg

Month and half later:
http://photos-d.ak.facebook.com/photos-ak-sf2p/v110/193/91/1331550331/n1331550331_30161159_3192.jpg
http://photos-c.ak.facebook.com/photos-ak-sf2p/v112/222/115/1331550135/n1331550135_30165526_3555.jpg

        (In that 2nd photo, I'm on the left in the black and white striped collared shirt. You can see things getting untidy in the back... if I weren't going to grow my hair out, I would have cut it then.)

I think I'm in what is called the "bad-hair phase" now. The back of my hair is growing uncontrollably and my front is just chillin... when the back curls up a lot I brush it clockwise into my neck to make it stay down, but then it looks like a mullet! (I've been informed of this by other people.) I will take pics of this asap. Should I get a maintenance cut, or let it curl in the back to keep the mullet look away?? I just want to have long hair! Is curling up in the back part of the long hair look? I'm too used to short hair to be able to accept it.

Thanks for any input!!