That single act by your drunken idiot friend will not make or break your sitch. Trust me.
Yes, it's not good that he did that, but it also didn't make the squirrel run away. The squirrel has never even come down out of the tree.
Even if you do end up divorced, your story still isn't over. Read about how common it is for people to remarry their former partners. Your sitch isn't hopeless.
This is another dip on the rollercoaster, ride it out.
If you think about it, you are still VERY early in your sitch. You have PLENTY of time to rectify things.
Relax and don't catastrophize so much. Just take a deep breath, realize that this sux but that you will get through it with time. There's no rushing this stuff, it takes a lot of patience.
Having patience is the last thing we want to hear when we are slowly dying inside but you must hang in there.
It really will be ok, no matter what happens. Don't give up.