If all of your friends say they're too busy to lend you an ear, at least one of them is a filthy liar. Find out which and tell them to kick rocks. If your boyfriend is too busy playing Angry Birds to hear you talk about your pressing mental issues, you need to have a serious talk as well.
I'm such a cynic that yes, that's the first thing I wanted to respond to. I get that not everyone out there is a lifeless loser such as myself and have jobs and such, but even out of a hypothetical group of friends as small as THREE, surely one of them over the course of 24 hours could spare some time for a distressed comrade. Sorry, that just pissed me off.
Anyway, I feel you on many points here. I'm 26, and I've watched friend after acquaintance after enemy go straight through college and end up with a good job and a great future outlook in their mid 20s. I'm not even at square one. I tried college, but the traditional classroom atmosphere bored the hell out of me (plus I was in a nice depressive season -- thanks Bipolar!) and I quit after a semester. Plus, the idea of future student loans kicked me in the sack before I got the chance to further look into it. So that made me feel even more left behind. BUT! You have some positives to focus on here: you got job applications in, and most importantly, you became aware of your affliction. Now you can begin to heal. Maybe if you talk to someone and all of these things you have going on become demystified, you'll feel a lot better.
You'll also feel much better if your boyfriend gets his thumbs off his phone for a few seconds every now and then. Best wishes to you.