Bipolar husband?

I’ve been married for 5 years, plus one year of dating... this guy used to be incredible, like a dream, perfect... always telling me everything a girl wants to hear, and treating me like a princess... till our daughter was born, then he started getting late, not helping me around, never ever wanted to be with his child, bothering me with sex ALL THE TIME even though I was so tired and with post partum depression... he got to the point of making me feel guilty about the fact that I was not making him cum everyday, we started to fight very ugly, talking shit about our parents, friends, ourselves... anyway it all went down very fast until his drinking problem got so worse + smoking MJ all day long with the excuse that since I was not making him feel loved, desired, wanted , he obviously have to be drunk or high all day to cope... and our daughter?... well nothing still since he always was thinking about himself.... ANYWAY.... I got so tired of this I told him to leave the house for him to act like a teenager and have that life forever... so he did, for 2 weeks, then came back all sad saying that he realized that he truly loved us, that now he knew what his flaws were, that I didn’t do anything wrong, that he has a sex addiction with me (he hates having to jack off a porn if he has a wife... those were his words) that he would work on fixing everything, doing exercises, stoping the alcohol and drugs, etc...and all a bunch of BS that I believe very much hoping for things to be wonderful again...a year after I’m pregnant again, he asked for another baby to give our daughter a sibling to play with since we live in a country all alone with no family... the moment I got pregnant he went again to behave exactly like before but WORSE... because all Covid thing started and the drinking got worse, the drugs, the needy behavior, he even started to claim that I was Cheating on him only because I was talking through WhatsApp a lot with my life friends... I just didn’t engage with any of this... my baby boy was born, and again he didn’t helped not even a bit with him, my baby would cry every now and then and he would not even move from his chair to see what was wrong with him, NOTHING... like if he didn’t existed, yes he was now a little bit more involved with our daughter, but nothing with the baby which made me feel so angry, frustrated and sad!!!! ... I talked to him about it millions of times and he would say that if I don’t make the effort to make him cum everyday he would not be interested in my things... that including OUR baby boy... so I got so mad!!! I then just started resenting him... I feel like if he was my enemy or something, we treated each other very bad and every day a little worse because we are defensive... now he has left the house again, he’s living in a friends living room, we are thinking of divorcing... it has been 2 months since this happened... every now and then comes with the promises and the stories about how he loves me and his family so much, he’s seeing a therapist 2 times a week, he says again he’s gonna stop the drinking, smoking, drugs... I am so tired, I think he’s not gonna change at all, I am very sad about how awful father he is, ok he gave us money... but he seems like if his kids were someone else’s kids... he says I do everything right that he is the one with the problem... but guess what??? When we gets horny... which is EVERYDAY... and I say something like... I’m gonna sleep I’m very tired, he starts again with the blaming, the guilt and shame... I can’t to this anymore even though I love him still... oh and just for you guys to know I have sex with him 2 times a week, sometimes more and this isn’t enough for him...

For now he still lives with his friend and we are not talking anymore, because he is mad at me and now he says that he simply stopped loving me... wtf ... is he bipolar? Has anybody been through something like this before? What should I do?? ... sorry if the writing is messy, I don’t even speak English very well, just needed to vent!! Thank you!