I need to rant..super stressed..

So almost 5 months ago, I found out I was going to be a mommy of twins. Me and my ex/babies father had broken up about a month after I was pregnant (didn't know I was pregnant until 8 weeks) so we still had no idea once we ended on that note after a long 6 year relationship. Since I ended up going to the doctors alone, not knowing what was wrong with me so I didn't decide to have anyone go with me, being the happy mother I was after I finding out I was pregnant with twins, I immediately called my babies father and told him the news. He was happy, shocked and etc of course, but after being pregnant for 5 months, he has not been with me through any of this.. he has been out partying, and doing whatever he wants to do. emotionally and physically it hurts big time. He hasn't been to any appointment but one, hasn't called to check on them to see how everything has been. And the most fucked up part of it is(excuse my language), he went and got another girl pregnant on top of that. Idk what I'm supposed to feel now at this point. Because my kids deserve a father who actually WANTS to be there. Not someone who is when it's convenient for them. I have done everything I could to be a good mommy and give them everything they want and need. But at this point I'm stuck, scared, emotional, sick, tired, drained. All of the above. I don't want to be with him, by all means, but I do want him to be there for our girls 😔 what should I do...please no negativity, I'm stressed enough