Well Sadly I'm working 40 Hours a day
Did you mean 40 hours a week? Don't turn that into an excuse, if you do somehow make it into the Ranger Regt. you will be working MUCH more than that, and will STILL find time to PT, I assure you. 8 hours a day is not that bad. You have plenty of time to come home, hit the gym and go for a nice 5 - 10 mile run. A year isn't that long.
i'm spending a little more time with my G/F and trying to get more on my feet and train before i enlist.
Do you want to be a Ranger, or do you want to spend time with your girlfriend? I may seem harsh, but you will fail if you are not 100% commited to your goal in becoming a Ranger.
As for the DEP program, it will allow you to enlist now and get your contract guaranteed, and ship out up to a year later.
It doesn't seem you're 100% commited to this. Take some time, think it through, find out where your heart is .. because if it isn't fully commited to this, you will fail.