I would let the issue of the text message to your SO's friend go. You did it when you were disappointed and angry. There's not way to take it back...so let it go. If this friend finally contacts you, keep your discussion about your SO to nil. Right now, the friend may not know how to deal w/you and the info.
Relatives are thicker than blood w/the MLCer and you will find that friends tend "choose" sides sometimes and he may have opted to sit on the sidelines a bit and wants to stay out of it.
What do you do? Leave it alone and don't contact this friend...if he is a true friend he'll contact you sometime, but again, it's alot of info for him to digest right now and he doesn't want to get in the middle of the situation. It's very normal.
BTW, please stop beating yourself up over this stuff. You are human being and until you get handle on your situation, you'll have one step forward, two steps back. It's normal!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
