Hello again:
You *are* in a ba way.

I'm sorry you're going through such a hard time. I think you're putting waaaay too much pressure on yourself and you have to make yourself step back from what's going on and look at it objectively.
So easy for me to say, right, since I'm not the one going through it. No sirree, Bob, I've been through this a few more times than you have. I know the pain of not knowing what the next day will bring. Of being between the devil and the deep blue sea, riding that emotional rollercoaster. You probably haven't been sleeping too well, either. I never did.
This is what I suggest:
1. Call in all the favor your friends owe you and hang out with them for awhile. If they're your friends they may be able to give you some perspective. At least you may be able to get away from your misery for awhile.
2. Find another way to occupy your time. Is there a favorite hobby or interest you have that you've been neglecting? Time to pick it up again and go at it with a vengance. Or start something--take up running or biking or something really physical (or study particle physics and explain it to me) that will just tire you out. Channel the negative energy you feel into something more positive.
3. Don't contact either one of them for awhile. I think your feelings are too raw at this point to be able to deal with either of them the way you really want to. This is probably the hardest thing of all to do because one, the other or both will keep popping into your brain and making you feel miserable. That's why you need to keep yourself busy.
No one says that you have to make a decision about either one of these. From what I'm reading, it doesn't sound like either of them wants a relationship. Gf2 still doesn't trust you, though you say you're innocent (and I have no reason not to believe you). She is O-U-T of the picture. No friend would cut you off for no good reason by taking the word of someone s/he doesn't know from Adam over taking your word.
Gf1 isn't offering you anything much, either.
You feel that these are your only two choices and they aren't. You're too close to the situation to think clearly about this. I know you don't want to get hurt again (getting hurt comes at any age and it doesn't get easier as one ages) but unfortunately that's the downside of a relationship.
I hesitate to bring this up because I don't want to come across as "preachy", but do you pray? I often find that praying helps a great deal if only to get a bit of peace of mind for awhile.
If you want to pm me about this, you're welcome to do so. I can't take your pain away from you much as I would like to. You have to go through this but you will learn some valuable lessons to help you in future relationships (from friendships through "true love").
Good luck and keep posting.