MIA: Mentally Incapable of Anything

The last month has been a bit of a roller-coaster for me...I'm officially having my quarter-life crisis. I've been on the brink of it for a couple of years, but about three weeks ago it hit me. Hard. I think it started because I really started to think about all the things I really want to do with my life: have a challenging but enjoyable career; fall in love and start a family; be financially stable. And I realized that I just wasn't where I wanted to be. I know there are not deadlines in life, but I am approaching my 28th birthday and I feel like I have very little to show for the last 27.92 years (yes, I did the math). Part of me feels so free, because I literally have nothing keeping me from doing anything, but this same freedom scares the heck out of me. It's scary having a million options. So scary that it causes me to freeze. Or go backwards (I was thisclose to packing up and moving home to live with my mother). I have a hard time making any decisions - even what I should buy at the store for food. I can fight with myself over the most mundane things. I think part of this is that while I technically have the freedom to do whatever, I really don't. I have student loans and bills and responsibilities. And as much as I just want to run away and make some mistakes and go crazy like I should have when I was in my early 20s, I know it's not nearly as tolerated or cute when you are closing in on 30. People expect me to be a grown-up and have my shit together, but I don't. So, I really don't have complete freedom. I want the freedom to mess-up. To go back to school and put myself in more debt for a degree that I love instead of the free MBA I can get through my mindless corporate job. I want to fall in love and fall out of love. I want to buy a dog and paint my walls some sort of absurd color. I want to go out with drinks with my girlfriends (of course, this is harder than it sounds since they are all married/attached/pregnant/mothers and never seem to have time for me). I want to quit my comfy corporate job for something that pays lower but makes me happier. I want a lot of things, unfortunately I'm so mentally incapable of doing anything due to fear that I'm just...stuck. So, my question to my very few, but very close readers is this - what do I do to get unstuck?