Hello,
I am sorry for what you are going through. I just wanted to post you a message of encouragement!
Reading your post shows some heavy feeling. I am not sure about that. What I can do is encourage you, and tell you to think rationally. I know it's about love so it's difficult. But at least, try not to get "sucked" into the "hole"... It distorts thought, etc. I felt that you maybe have some of this "active" right now, when reading your post:
My situation makes me think I cannot be close to the members of this forum but I can't go anywhere.
I am sincerely sorry. It appears to me that you would need first to alleviate a bit the "sucking" effect? That's to be able to think and function optimally. First things first: standing on two feet. Get the brain running. Tomorrow is another day and in six months you will have a whole different perspective than today. That's the sucking effect. It monopolizes the thoughts and paralyzes a bit the open mind. You may feel: "one road only", etc.
You can be close to the members of the forum! - they won't judge you. Some will tell you "hey why did you do that - it's bad" - But - such sincerity
includes, too, not running away from you, and, on the opposite that what you may think, they would remain at your side... 
So:
- I see you kind of despaired, and not able to get out of the momentum, or thinking clearly. That's understandable!
- People won't neglect you or not help you, here. You can be "close" to the members of the forum.
STO may be asking for a couple of things ... but I think that what they want is to see us proud of ourselves, standing on two feet, so that we can learn (and possibly, one day, learn a couple of 4D lessons, for example). It seems that it's more a long run project. I would say: don't be afraid of a "door closure". That's not how they function, that's not how the Universe works. They got "redemption" in their "bag". They can accept that somebody "fails" or does a mistake. Your thought includes an eliminatory statement, it seems. Let me tell you that I don't think that it is eliminatory, what happened to you. But they would tell you "ho-ho-ho what's this?!".
And then, on the matter itself, well, I don't know what to tell you. As you did not have sexual relationships, you still have some room. You could solve this, one scenario would imply forcing you a bit than to remain away from the new lady... Would it be possible for you to consider leaving this "episode" as it was, and going back to your normal days?
I am sorry, I don't have the words that others sometimes have, here. You could post in "The Swamp"? It gives more attention, both for you and others. You seem to need encouragement. People cannot know how you feel if you don't tell them. It may be of help for you to widen your perspective, and this can be done if you write more, and if you receive more comments. Try to think of this, then, posting in the Swamp.