Welcome @Epiphany to this wonderful forum. This forum is a great tool for sobriety.
If I were you I’d not go to the parties, it’s almost a guaranteed relapse if you go.
Also, you need to prioritize. If your partner doesn’t support you, then what is more important? Life or love?
I recommend you to check in daily to maintain focus
You’ll have a lot of spare time now. Therefore I recommend finding some new hobbies like playing with your son, walking, jogging, yoga, cycling, drawing, reading a book, writing, swimming, etc… There are so many possibilities.
I also recommend practising mindfulness. It helps with keeping your mind off drinking. It also helps with obtaining peace in your mind.
This one is a tat odd, but I also recommend giving your addiction a name. That way you know who you are fighting and you will have more awareness of your addiction.
Reading on this forum a lot and asking things on here is also very useful since it helps you maintain focus on recovery.
Thinking about not drinking for the rest of your life is a terrifying thought. Thinking I won’t drink just for today and tomorrow is another day is much better.
Your mind is a dick. It will do anything it takes to kill you through addiction. It will tell you that you can drink just once, it will always be there to kill you, especially when life is good. When life is good you’re not as focused on addiction anymore so than it’s the easiest time for addiction to creep in.
you can never drink just one. It will be more than one. If you have been sober for a long while and you relapse, it can kill you. So never ever think you can drink just once. NEVER
If you have cravings, play the tape. Think for yourself, what will happen if I relapse?
Will I be dancing filled with joy or hate yourself, feel guilt and shame? I think we both know the answer.
I hope this helps you. Good luck on your journey, you’ve got this 
