2 years of marriage down the drain

My ex (still married) husband and I’s 2 year wedding anniversary is the 24th and I’m just feeling really depressed and I’m trying not to because I don’t want to stress for my babies safety. We broke up in May and he has a new gf who is extremely disrespectful.. I do good most days but with the 24th approaching it’s hard. She’s going to live with him for a few months on the 25th as well so contact will be limited most likely so I’m back to square one of not being able to talk to him about his son.. sigh. Sorry for the vent.