IMO there is nothing more honorable than serving your country in the military....I constantly think I should have gone in to be a pilot (what i do now). I will more than likely join the air national guard later on down the road.

Security can be extremely boring but it can be extremely important. the boring will outweigh the important about 10000/1. My best friend lost his job as an electrician, has been a security guard at the CDC for about the last year....very very very boring work, very very very odd hours (4-midnight, sometimes 4pm-4am, then in the same week 12-8, or 6-4...he just never knows (he is also the junior guy).
His Dad worked at Rocky flats for I think 20 years...never had much of anything happen, they got to shoot some cool guns, got paid pretty good and overall made the best of it.

What you need to think about it what you want to do in life, if you want to have a family, be there for them, or be a stag for a while. If you choose the later I highly recommend the military...even then those guys make families work, you just have to find the right woman.
if you go in the military, stick it out until you get retirement. I best almost every guy on here that is a vet would tell you they are happy they made it to their retirement or wish they would have. (of course there are exception though).

If anything, go to a cheap junior college that could potentially transfer credits to another college you might be interested in, take a semesters worth of classes to think about things but keep working toward your future. Even look into Metro. Great school and lots of options.

In the end, it is your decision, if you go to the military do it because you want to and because you are going to serve a high cause than yourself.